Add note about npm optional deps issue (from #76)
Add note about npm optional deps issue (from #76)

tpgmartin/polymer-starter-kit,andrefuller/PolymerTrailerViewer,proplanr/polymer-starter-kit,fousheezy/ncdc-events,Jelle-imitto/tools-polymer,RoyKoh/Project-3,WestchesterPublicLibrary/WPLreports,SB-Technology-Holdings-International/Water,paddeee/farrel,GNURub/polymer-starter-kit,shauvik/polymer-starter-kit,pedrogasg/polypdu,talee/flex,stefanoantonel/ecofit,patsissons/polymer-starter-kit,elenadatsiuk/tinkersolomid,vfarcic/polymer,SB-Technology-Holdings-International/WateringWebClient,StartPolymer/polymer-starter-kit,bsparks/polymer-starter-kit,FaellCarvalho/Geo-Location,stevenquiroa/thepolymerproject,budnik/polymer-starter-kit,alexpaluzzi/polymer-starter-kit,uvalib/alderman-renew,trendystore/store,RichOren/polymer-starter-kit,HIROSN/polymer-starter-kit,ndrd/nodrd-js,pathfinderstudios/polymer-starter-kit,VandeurenGlenn/web-import,be-cloud-js/odoo-dashboard,altereagle/polymer-starter-kit,bird1235456/polymer-starter-kit,blmarket/my-polymer-elements,hocine-h/polymer-starter-kit,gianluka79/First,michaetto/f16,hliyan/polymer-starter-kit,timeu/polymer-starter-kit,egohub/appdesign,gertcuykens/polymer-starter-kit,kenjitayama/polymer-starter-kit,bendroid/polymer-starter-kit,Jelle-imitto/tools-polymer,felixzapata/polymer-starter-kit,JnJSW/dttdata,jimivdw/polymer-starter-kit,vl4dt/polymer-starter-kit,stefanoantonel/brainpower,patsissons/polymer-starter-kit,natabbotts/blogs.org.uk,andrefuller/PolymerTrailerViewer,natabbotts/blogs.org.uk,pedrogasg/polypdu,gick/reveries-project,elementron/elementron,bdnorg/tmi,ek/polymer-starter-kit,ragingwind/polymer-starter-kit,liris-tweak/taaabs,gick/mobile-polymer-starter-2,gick/mobile-polymer-starter-2,dennisg/luminis-colleagues,didrocks/site-julie,egohub/appdesign,Awarua-/Agilefant-Times-Polymer-Front-end,anusornc/polymer-starter-kit,bird1235456/polymer-starter-kit,Nzaga/polymer-starter-kit,soonick/polymer-starter-kit,StartPolymer/polymer-starter-kit-plus,StatelessCat/zealous-octo-wookie,stephenzsy/charon-frontend,RichOren/polymer-starter-kit,soonick/polymer-starter-kit,simonfan/polymer-starter-kit,pathfinderstudios/polymer-starter-kit,klarkc/polymer-loopback-starter-kit,elementron/elementron,proplanr/polymer-starter-kit,uvalib/wayfinding-kiosk,grouma/web-remote,jvkops/polymer-starter-kit,didrocks/site-julie,taranjeetsapra/polymer-starter-kit,M4gn4tor/polymer-starter-kit,lordoftheflies/mlm-portal,Jelle-imitto/tools-polymer,MyanmarAPI/data-entry-app,liris-tweak/taaabs,simonfan/polymer-starter-kit,markovuksanovic/polymer-starter-kit,paul-jean/polymer-starter-kit,SB-Technology-Holdings-International/WateringWebClient,jimivdw/polymer-starter-kit,VandeurenGlenn/web-import,blmarket/my-polymer-elements,budnik/polymer-starter-kit,arthurvr/polymer-starter-kit,abdonrd/polymer-starter-kit,samccone/polymer-starter-kit,eafelix/polymer-starter-kit,neo0rabie/Portfolio,bsparks/polymer-starter-kit,grouma/web-remote,Nzaga/polymer-starter-kit,mtusk/polymer-starter-kit,babinux/testsignup,ragingwind/polymer-starter-kit,ek/polymer-starter-kit,sebs/cat-toy,Joostvanderlaan/polymer-starter-kit-1,1001genomes/admixture-map,bright-sparks/polymer-starter-kit,muhanadra/Portfolio,anusornc/polymer-starter-kit,StatelessCat/psk-html-importer,stefanoantonel/ecofit,noahlaux/polymer-starter-kit,hwangc/polymer-starter-kit,datalink747/polymer-starter-kit,Ex-ante-Labs/pivot-ahead,paul-jean/polymer-starter-kit,yi-jiayu/mahjong-calculator-v2,proplanr/polymer-starter-kit,paulcbetts/polymer-starter-kit,TheFinestArtist/HandbellChoir-Web,SB-Technology-Holdings-International/WateringWebClient,GNURub/polymer-starter-kit,gertcuykens/polymer-starter-kit,ianholing/geowall-project,sebs/cat-toy,hourliert/polymer-starter-kit,Jelle-imitto/tools-polymer,DHSDevelopersClub/home-access-client,jamesthechamp/polymer-starter-kit,semafloor/semafloor-test-alpha,LM450N/polymer-starter-kit,markovuksanovic/polymer-starter-kit,trendystore/store,plusCubed/pluscubed-site,Negashev/negash.ru,patilharshali/polymer-starter-kit,trendystore/store,klarkc/polymer-loopback-starter-kit,OscaRoa/polymer-starter-kit,abdonrd/polymer-starter-kit,jdavidagudelo/polymerstarter,alexpaluzzi/polymer-starter-kit,WestchesterPublicLibrary/WPLreports,FaellCarvalho/Geo-Location,anthonybrown/polymer-starter-kit,michaetto/f16,m4h4n/polymer-starter-kit,semafloor/semafloor-test-alpha,altereagle/polymer-starter-kit,gick/reveries-project,kristianmandrup/polymer-starter-kit-plus,WestchesterPublicLibrary/WPLreports,SB-Technology-Holdings-International/Water,eafelix/polymer-starter-kit,newrocknj/polymer-starter-kit,Jelle-imitto/tools-polymer,MontyNish/polymer-starter-kit,fousheezy/ncdc-events,bright-sparks/polymer-starter-kit,finch0219/polymer-starter-kit,camargoanderso/polymer-starter-kit,stephenzsy/charon-frontend,jeffposnick/polymer-starter-kit,baberthal/polymer-starter-kit,noahlaux/polymer-starter-kit,markovuksanovic/polymer-starter-kit,lordoftheflies/mlm-portal,ndrd/nodrd-js,kenjitayama/polymer-starter-kit,gick/mobile-polymer-starter-2,Negashev/i-kosmetolog,kristianmandrup/polymer-starter-kit,dennisg/luminis-colleagues,MontyNish/polymer-starter-kit,StartPolymer/polymer-starter-kit-plus,shawnhermans/polymer-starter-kit,gianluka79/First,Ex-ante-Labs/pivot-ahead,uvalib/wayfinding-kiosk,hectorguo/polymer-starter-kit,tecla5/site,Awarua-/Agilefant-Times-Polymer-Front-end,DHSDevelopersClub/home-access-client,andrefuller/PolymerTrailerViewer,elenadatsiuk/tinkersolomid,be-cloud-js/odoo-dashboard,Serious-Rage/poligomy,Negashev/negash.ru,jeffposnick/polymer-starter-kit,DHSDevelopersClub/home-access-client,hliyan/polymer-starter-kit,arthurvr/polymer-starter-kit,vfarcic/polymer,baberthal/polymer-starter-kit,HIROSN/polymer-starter-kit,RoyKoh/Project-3,gertcuykens/polymer-starter-kit,didrocks/site-julie,M4gn4tor/polymer-starter-kit,bendroid/polymer-starter-kit,1001genomes/admixture-map,samccone/polymer-starter-kit,stefanoantonel/brainpower,didrocks/site-julie,Sykkro/penny-web,shingo-kumagai/polymer-starter-kit,yi-jiayu/mahjong-calculator-v2,babinux/testsignup,gianluka79/First,asternux/polymer-starter-kit,timeu/polymer-starter-kit,Ex-ante-Labs/shopper.ninja,SB-Technology-Holdings-International/Water,hectorguo/polymer-starter-kit,elementron/elementron,stevenquiroa/thepolymerproject,tecla5/site,mtusk/polymer-starter-kit,kristianmandrup/polymer-starter-kit-plus,stevenquiroa/polymer-starter-kit,FTG-003/polymer-starter-kit,stefanoantonel/ecofit,jamesthechamp/polymer-starter-kit,grebett/polymer-starter-kit,Negashev/negash.ru,jakemac53/polymer-starter-kit,grebett/polymer-starter-kit,klarkc/polymer-loopback-starter-kit,alexpaluzzi/polymer-starter-kit,uvalib/alderman-renew,paul-jean/foo-bar-element,WestchesterPublicLibrary/WPLreports,paddeee/farrel,StatelessCat/psk-html-importer,gick/reveries-project,stevenquiroa/polymer-starter-kit,jvkops/polymer-starter-kit,Ex-ante-Labs/shopper.ninja,didrocks/polymer-starter-kit,Serious-Rage/poligomy,m4h4n/polymer-starter-kit,tpgmartin/polymer-starter-kit,OscaRoa/polymer-starter-kit,hocine-h/polymer-starter-kit,newrocknj/polymer-starter-kit,didrocks/polymer-starter-kit,RoyKoh/Project-3,lordoftheflies/mlm-portal,victorgb6/id-questionary,Negashev/i-kosmetolog,SB-Technology-Holdings-International/WateringWebClient,elegant651/polyfolio,kristianmandrup/polymer-starter-kit,taranjeetsapra/polymer-starter-kit,patilharshali/polymer-starter-kit,plusCubed/pluscubed-site,Sykkro/penny-web,robdodson/polymer-starter-kit,felixzapata/polymer-starter-kit,anthonybrown/polymer-starter-kit,ianholing/geowall-project,paul-jean/polymer-starter-kit,DHSDevelopersClub/home-access-client,felixzapata/polymer-starter-kit,SB-Technology-Holdings-International/Water,mikaelharsjo/polymer-starter-kit,jakemac53/polymer-starter-kit,mikaelharsjo/polymer-starter-kit,talee/flex,bdnorg/tmi,flaiker/polymer-starter-kit,SB-Technology-Holdings-International/Water,hbx5555/polymer-starter-kit,datalink747/polymer-starter-kit,LM450N/polymer-starter-kit,muhanadra/Portfolio,victorgb6/id-questionary,grebett/polymer-starter-kit,michaetto/f16,Negashev/i-kosmetolog,semafloor/semafloor-test-alpha,camargoanderso/polymer-starter-kit,shawnhermans/polymer-starter-kit,LM450N/polymer-starter-kit,paddeee/farrel,JnJSW/dttdata,MyanmarAPI/data-entry-app,paulcbetts/polymer-starter-kit,stephenzsy/charon-frontend,asternux/polymer-starter-kit,finch0219/polymer-starter-kit,shauvik/polymer-starter-kit,paul-jean/foo-bar-element,shingo-kumagai/polymer-starter-kit,hwangc/polymer-starter-kit,Joostvanderlaan/polymer-starter-kit-1,StatelessCat/zealous-octo-wookie,robdodson/polymer-starter-kit,ragingwind/polymer-starter-kit,pathfinderstudios/polymer-starter-kit,FTG-003/polymer-starter-kit,elegant651/polyfolio,hbx5555/polymer-starter-kit,hourliert/polymer-starter-kit,neo0rabie/Portfolio,flaiker/polymer-starter-kit,TheFinestArtist/HandbellChoir-Web,jdavidagudelo/polymerstarter,JnJSW/dttdata,Sykkro/penny-web,FaellCarvalho/Geo-Location,StartPolymer/polymer-starter-kit,Serious-Rage/poligomy,victorgb6/id-questionary,vl4dt/polymer-starter-kit