save the current user email into the order if a user is logged in [#490 state:resolved responsible:paulcc]
save the current user email into the order if a user is logged in [#490 state:resolved responsible:paulcc]

notice that the guest user email address will come in as params[:order][:email]
and so be added to @order during the nested attributes update (and won't be
over-written because current_user will be nil).

urimikhli/spree,trigrass2/spree,progsri/spree,orenf/spree,Engeltj/spree,vcavallo/spree,raow/spree,shioyama/spree,abhishekjain16/spree,bjornlinder/Spree,ahmetabdi/spree,freerunningtech/spree,richardnuno/solidus,vivekamn/spree,dandanwei/spree,dafontaine/spree,vcavallo/spree,lzcabrera/spree-1-3-stable,caiqinghua/spree,derekluo/spree,gotoAndBliss/True-Jersey,Hawaiideveloper/shoppingcart,FadliKun/spree,calvinl/spree,judaro13/spree-fork,jhnsntmthy/tgs_store,robodisco/spree,woboinc/spree,Senjai/spree,CiscoCloud/spree,codesavvy/sandbox,vcavallo/spree,grzlus/solidus,camelmasa/spree,assembledbrands/spree,ramkumar-kr/spree,vinsol/spree,AgilTec/spree,Kagetsuki/spree,Hates/spree,volpejoaquin/spree,robodisco/spree,DarkoP/spree,xuewenfei/solidus,assembledbrands/spree,ayb/spree,gotoAndBliss/True-Jersey,azranel/spree,trigrass2/spree,rbngzlv/spree,vivekamn/spree,miyazawatomoka/spree,softr8/spree,kitwalker12/spree,azclick/spree,azclick/spree,jspizziri/spree,gregoryrikson/spree-sample,ujai/spree,trigrass2/spree,gregoryrikson/spree-sample,Engeltj/spree,tancnle/spree,tesserakt/clean_spree,FadliKun/spree,lsirivong/solidus,odk211/spree,welitonfreitas/spree,athal7/solidus,Senjai/solidus,gautamsawhney/spree,archSeer/spree,vinayvinsol/spree,sfcgeorge/spree,njerrywerry/spree,rakibulislam/spree,ahmetabdi/spree,delphsoft/spree-store-ballchair,jspizziri/spree,pjmj777/spree,zaeznet/spree,jordan-brough/spree,lsirivong/spree,berkes/spree,RatioClothing/spree,jparr/spree,jsurdilla/solidus,lsirivong/solidus,reidblomquist/spree,adaddeo/spree,kewaunited/spree,Mayvenn/spree,grzlus/solidus,karlitxo/spree,tomash/spree,yushine/spree,abhishekjain16/spree,madetech/spree,Hates/spree,patdec/spree,beni55/spree,APohio/spree,vinayvinsol/spree,APohio/spree,TrialGuides/spree,jaspreet21anand/spree,reinaris/spree,SadTreeFriends/spree,firman/spree,tomash/spree,rajeevriitm/spree,fahidnasir/spree,forkata/solidus,JDutil/spree,rakibulislam/spree,tancnle/spree,Boomkat/spree,cutefrank/spree,sfcgeorge/spree,ujai/spree,beni55/spree,thogg4/spree,alvinjean/spree,dotandbo/spree,Hawaiideveloper/shoppingcart,brchristian/spree,jhnsntmthy/tgs_store,sunny2601/spree,xuewenfei/solidus,cutefrank/spree,lzcabrera/spree-1-3-stable,shekibobo/spree,dandanwei/spree,gautamsawhney/spree,trigrass2/spree,rbngzlv/spree,siddharth28/spree,vinsol/spree,brchristian/spree,siddharth28/spree,moneyspyder/spree,jaspreet21anand/spree,surfdome/spree,nooysters/spree,TimurTarasenko/spree,Nevensoft/spree,Arpsara/solidus,tomash/spree,NerdsvilleCEO/spree,surfdome/spree,FadliKun/spree,Kagetsuki/spree,hifly/spree,patdec/spree,thogg4/spree,jsurdilla/solidus,joanblake/spree,piousbox/spree,alvinjean/spree,azclick/spree,preston-scott/spree,rajeevriitm/spree,miyazawatomoka/spree,bonobos/solidus,StemboltHQ/spree,imella/spree,caiqinghua/spree,codesavvy/sandbox,reinaris/spree,progsri/spree,sideci-sample/sideci-sample-spree,lyzxsc/spree,dafontaine/spree,pronix/kenigtorg,yushine/spree,shaywood2/spree,rbngzlv/spree,pervino/spree,locomotivapro/spree,TimurTarasenko/spree,locomotivapro/spree,Hawaiideveloper/shoppingcart,omarsar/spree,jspizziri/spree,patdec/spree,raow/spree,yomishra/pce,vinayvinsol/spree,imella/spree,jordan-brough/solidus,yomishra/pce,Migweld/spree,derekluo/spree,shioyama/spree,joanblake/spree,PhoenixTeam/spree_phoenix,tancnle/spree,ahmetabdi/spree,yushine/spree,rajeevriitm/spree,biagidp/spree,PhoenixTeam/spree_phoenix,sunny2601/spree,Ropeney/spree,hifly/spree,vulk/spree,preston-scott/spree,Machpowersystems/spree_mach,lsirivong/solidus,Ropeney/spree,delphsoft/spree-store-ballchair,azclick/spree,softr8/spree,judaro13/spree-fork,Kagetsuki/spree,madetech/spree,volpejoaquin/spree,keatonrow/spree,radarseesradar/spree,Senjai/spree,Engeltj/spree,camelmasa/spree,moneyspyder/spree,NerdsvilleCEO/spree,lyzxsc/spree,pulkit21/spree,bricesanchez/spree,edgward/spree,maybii/spree,Nevensoft/spree,bonobos/solidus,Lostmyname/spree,vcavallo/spree,devilcoders/solidus,kewaunited/spree,TimurTarasenko/spree,Hawaiideveloper/shoppingcart,knuepwebdev/FloatTubeRodHolders,quentinuys/spree,Machpowersystems/spree_mach,CiscoCloud/spree,Mayvenn/spree,Antdesk/karpal-spree,delphsoft/spree-store-ballchair,adaddeo/spree,welitonfreitas/spree,PhoenixTeam/spree_phoenix,odk211/spree,hoanghiep90/spree,tesserakt/clean_spree,builtbybuffalo/spree,joanblake/spree,njerrywerry/spree,vmatekole/spree,locomotivapro/spree,beni55/spree,ckk-scratch/solidus,piousbox/spree,RatioClothing/spree,maybii/spree,woboinc/spree,calvinl/spree,piousbox/spree,berkes/spree,berkes/spree,jordan-brough/solidus,thogg4/spree,volpejoaquin/spree,mindvolt/spree,sunny2601/spree,priyank-gupta/spree,groundctrl/spree,CJMrozek/spree,alejandromangione/spree,mindvolt/spree,caiqinghua/spree,ramkumar-kr/spree,ramkumar-kr/spree,ckk-scratch/solidus,shaywood2/spree,jeffboulet/spree,PhoenixTeam/spree_phoenix,Arpsara/solidus,mleglise/spree,maybii/spree,nooysters/spree,derekluo/spree,biagidp/spree,Senjai/solidus,sunny2601/spree,Mayvenn/spree,grzlus/spree,jparr/spree,jparr/spree,derekluo/spree,net2b/spree,calvinl/spree,jordan-brough/spree,hoanghiep90/spree,DarkoP/spree,azranel/spree,jordan-brough/solidus,quentinuys/spree,vinayvinsol/spree,alejandromangione/spree,firman/spree,FadliKun/spree,beni55/spree,surfdome/spree,KMikhaylovCTG/spree,TimurTarasenko/spree,jordan-brough/spree,Boomkat/spree,SadTreeFriends/spree,KMikhaylovCTG/spree,Senjai/solidus,jimblesm/spree,moneyspyder/spree,tesserakt/clean_spree,athal7/solidus,karlitxo/spree,jasonfb/spree,zaeznet/spree,HealthWave/spree,dandanwei/spree,tancnle/spree,fahidnasir/spree,jimblesm/spree,hoanghiep90/spree,jhawthorn/spree,zamiang/spree,vinsol/spree,yushine/spree,Senjai/spree,archSeer/spree,alejandromangione/spree,orenf/spree,mindvolt/spree,Boomkat/spree,sanjay1185/mystore,DynamoMTL/spree,devilcoders/solidus,shekibobo/spree,omarsar/spree,progsri/spree,DynamoMTL/spree,firman/spree,groundctrl/spree,CJMrozek/spree,ayb/spree,karlitxo/spree,shaywood2/spree,xuewenfei/solidus,useiichi/spree,Migweld/spree,project-eutopia/spree,zamiang/spree,wolfieorama/spree,AgilTec/spree,forkata/solidus,gregoryrikson/spree-sample,judaro13/spree-fork,reidblomquist/spree,jasonfb/spree,scottcrawford03/solidus,carlesjove/spree,brchristian/spree,lsirivong/spree,devilcoders/solidus,athal7/solidus,cutefrank/spree,bonobos/solidus,vmatekole/spree,DarkoP/spree,sliaquat/spree,net2b/spree,pervino/solidus,Hates/spree,jhawthorn/spree,jhawthorn/spree,grzlus/solidus,njerrywerry/spree,DarkoP/spree,bjornlinder/Spree,ayb/spree,carlesjove/spree,JDutil/spree,jspizziri/spree,pervino/spree,Machpowersystems/spree_mach,moneyspyder/spree,grzlus/solidus,tailic/spree,LBRapid/spree,APohio/spree,omarsar/spree,lsirivong/solidus,pulkit21/spree,Migweld/spree,quentinuys/spree,lyzxsc/spree,Antdesk/karpal-spree,pervino/spree,maybii/spree,vmatekole/spree,agient/agientstorefront,knuepwebdev/FloatTubeRodHolders,watg/spree,Antdesk/karpal-spree,firman/spree,kewaunited/spree,LBRapid/spree,grzlus/spree,dotandbo/spree,Ropeney/spree,edgward/spree,JDutil/spree,grzlus/spree,jeffboulet/spree,sideci-sample/sideci-sample-spree,caiqinghua/spree,CJMrozek/spree,HealthWave/spree,rakibulislam/spree,delphsoft/spree-store-ballchair,gautamsawhney/spree,jparr/spree,dotandbo/spree,omarsar/spree,kitwalker12/spree,rajeevriitm/spree,kitwalker12/spree,alepore/spree,jordan-brough/solidus,mindvolt/spree,alejandromangione/spree,bjornlinder/Spree,keatonrow/spree,dafontaine/spree,jhnsntmthy/tgs_store,sfcgeorge/spree,pjmj777/spree,yiqing95/spree,forkata/solidus,ramkumar-kr/spree,kewaunited/spree,useiichi/spree,mleglise/spree,pervino/solidus,shekibobo/spree,richardnuno/solidus,useiichi/spree,fahidnasir/spree,hifly/spree,odk211/spree,biagidp/spree,sliaquat/spree,alepore/spree,keatonrow/spree,groundctrl/spree,Lostmyname/spree,odk211/spree,forkata/solidus,net2b/spree,zaeznet/spree,nooysters/spree,vinsol/spree,groundctrl/spree,raow/spree,Nevensoft/spree,jaspreet21anand/spree,alvinjean/spree,JuandGirald/spree,tomash/spree,NerdsvilleCEO/spree,wolfieorama/spree,adaddeo/spree,mleglise/spree,reinaris/spree,agient/agientstorefront,CJMrozek/spree,vulk/spree,hoanghiep90/spree,codesavvy/sandbox,njerrywerry/spree,richardnuno/solidus,pjmj777/spree,priyank-gupta/spree,shioyama/spree,azranel/spree,camelmasa/spree,builtbybuffalo/spree,radarseesradar/spree,scottcrawford03/solidus,radarseesradar/spree,Boomkat/spree,degica/spree,siddharth28/spree,JuandGirald/spree,RatioClothing/spree,dandanwei/spree,Kagetsuki/spree,madetech/spree,TrialGuides/spree,carlesjove/spree,robodisco/spree,welitonfreitas/spree,richardnuno/solidus,DynamoMTL/spree,vulk/spree,locomotivapro/spree,ckk-scratch/solidus,HealthWave/spree,jasonfb/spree,project-eutopia/spree,priyank-gupta/spree,sideci-sample/sideci-sample-spree,sfcgeorge/spree,siddharth28/spree,karlitxo/spree,pervino/solidus,welitonfreitas/spree,archSeer/spree,volpejoaquin/spree,wolfieorama/spree,watg/spree,dafontaine/spree,CiscoCloud/spree,adaddeo/spree,JuandGirald/spree,jeffboulet/spree,josephholsten/plain-sight,project-eutopia/spree,calvinl/spree,urimikhli/spree,KMikhaylovCTG/spree,azranel/spree,degica/spree,Nevensoft/spree,CiscoCloud/spree,pervino/spree,patdec/spree,tesserakt/clean_spree,degica/spree,lyzxsc/spree,jsurdilla/solidus,tailic/spree,pulkit21/spree,woboinc/spree,radarseesradar/spree,shekibobo/spree,raow/spree,bricesanchez/spree,bonobos/solidus,orenf/spree,reidblomquist/spree,net2b/spree,lzcabrera/spree-1-3-stable,dotandbo/spree,rbngzlv/spree,hifly/spree,keatonrow/spree,Arpsara/solidus,carlesjove/spree,miyazawatomoka/spree,rakibulislam/spree,knuepwebdev/FloatTubeRodHolders,pronix/kenigtorg,SadTreeFriends/spree,vulk/spree,josephholsten/plain-sight,sliaquat/spree,SadTreeFriends/spree,APohio/spree,scottcrawford03/solidus,Mayvenn/spree,Arpsara/solidus,alepore/spree,Lostmyname/spree,sliaquat/spree,jaspreet21anand/spree,orenf/spree,zamiang/spree,jeffboulet/spree,AgilTec/spree,gautamsawhney/spree,reidblomquist/spree,abhishekjain16/spree,bricesanchez/spree,softr8/spree,Engeltj/spree,reinaris/spree,project-eutopia/spree,grzlus/spree,freerunningtech/spree,Senjai/solidus,Migweld/spree,scottcrawford03/solidus,progsri/spree,lsirivong/spree,brchristian/spree,jimblesm/spree,athal7/solidus,piousbox/spree,lsirivong/spree,yiqing95/spree,watg/spree,StemboltHQ/spree,zaeznet/spree,mleglise/spree,thogg4/spree,nooysters/spree,ujai/spree,pulkit21/spree,devilcoders/solidus,camelmasa/spree,fahidnasir/spree,quentinuys/spree,yiqing95/spree,yiqing95/spree,gregoryrikson/spree-sample,cutefrank/spree,TrialGuides/spree,ckk-scratch/solidus,tailic/spree,robodisco/spree,freerunningtech/spree,JDutil/spree,zamiang/spree,jimblesm/spree,yomishra/pce,Ropeney/spree,useiichi/spree,wolfieorama/spree,builtbybuffalo/spree,jsurdilla/solidus,madetech/spree,DynamoMTL/spree,agient/agientstorefront,assembledbrands/spree,abhishekjain16/spree,edgward/spree,ayb/spree,priyank-gupta/spree,alvinjean/spree,berkes/spree,imella/spree,ahmetabdi/spree,JuandGirald/spree,softr8/spree,codesavvy/sandbox,urimikhli/spree,AgilTec/spree,miyazawatomoka/spree,LBRapid/spree,StemboltHQ/spree,joanblake/spree,jasonfb/spree,xuewenfei/solidus,Lostmyname/spree,edgward/spree,surfdome/spree,builtbybuffalo/spree,KMikhaylovCTG/spree,agient/agientstorefront,NerdsvilleCEO/spree,vmatekole/spree,Hates/spree,pervino/solidus,TrialGuides/spree,bryanmtl/spree_clear2pay,archSeer/spree,shaywood2/spree