add python3 + django 1.7 + sqlite as valid tox config
add python3 + django 1.7 + sqlite as valid tox config

bjesus/wagtail,KimGlazebrook/wagtail-experiment,stevenewey/wagtail,mayapurmedia/wagtail,jorge-marques/wagtail,iho/wagtail,WQuanfeng/wagtail,rjsproxy/wagtail,benemery/wagtail,WQuanfeng/wagtail,kurtrwall/wagtail,nilnvoid/wagtail,takeflight/wagtail,KimGlazebrook/wagtail-experiment,marctc/wagtail,inonit/wagtail,rv816/wagtail,mikedingjan/wagtail,kurtw/wagtail,rsalmaso/wagtail,JoshBarr/wagtail,janusnic/wagtail,torchbox/wagtail,mephizzle/wagtail,tangentlabs/wagtail,benemery/wagtail,m-sanders/wagtail,chimeno/wagtail,stevenewey/wagtail,iansprice/wagtail,wagtail/wagtail,quru/wagtail,serzans/wagtail,thenewguy/wagtail,wagtail/wagtail,WQuanfeng/wagtail,mixxorz/wagtail,gogobook/wagtail,m-sanders/wagtail,Klaudit/wagtail,KimGlazebrook/wagtail-experiment,darith27/wagtail,nrsimha/wagtail,jorge-marques/wagtail,bjesus/wagtail,mephizzle/wagtail,iho/wagtail,dresiu/wagtail,jordij/wagtail,benjaoming/wagtail,mayapurmedia/wagtail,timorieber/wagtail,rsalmaso/wagtail,stevenewey/wagtail,timorieber/wagtail,janusnic/wagtail,taedori81/wagtail,rjsproxy/wagtail,willcodefortea/wagtail,davecranwell/wagtail,thenewguy/wagtail,dresiu/wagtail,kaedroho/wagtail,rsalmaso/wagtail,zerolab/wagtail,benemery/wagtail,mjec/wagtail,gasman/wagtail,chimeno/wagtail,gogobook/wagtail,nutztherookie/wagtail,wagtail/wagtail,jordij/wagtail,benemery/wagtail,zerolab/wagtail,rsalmaso/wagtail,wagtail/wagtail,gogobook/wagtail,zerolab/wagtail,nilnvoid/wagtail,rjsproxy/wagtail,thenewguy/wagtail,Toshakins/wagtail,darith27/wagtail,torchbox/wagtail,m-sanders/wagtail,takeflight/wagtail,zerolab/wagtail,iansprice/wagtail,bjesus/wagtail,hanpama/wagtail,WQuanfeng/wagtail,rv816/wagtail,mayapurmedia/wagtail,jorge-marques/wagtail,takeshineshiro/wagtail,benjaoming/wagtail,davecranwell/wagtail,Toshakins/wagtail,wagtail/wagtail,hamsterbacke23/wagtail,mjec/wagtail,takeshineshiro/wagtail,Tivix/wagtail,hanpama/wagtail,Pennebaker/wagtail,marctc/wagtail,willcodefortea/wagtail,kurtrwall/wagtail,serzans/wagtail,nrsimha/wagtail,kaedroho/wagtail,torchbox/wagtail,FlipperPA/wagtail,mjec/wagtail,m-sanders/wagtail,kaedroho/wagtail,janusnic/wagtail,Pennebaker/wagtail,chimeno/wagtail,nrsimha/wagtail,marctc/wagtail,mixxorz/wagtail,dresiu/wagtail,inonit/wagtail,iansprice/wagtail,timorieber/wagtail,FlipperPA/wagtail,gasman/wagtail,FlipperPA/wagtail,inonit/wagtail,willcodefortea/wagtail,Toshakins/wagtail,Toshakins/wagtail,chrxr/wagtail,zerolab/wagtail,jorge-marques/wagtail,Tivix/wagtail,nealtodd/wagtail,thenewguy/wagtail,gasman/wagtail,JoshBarr/wagtail,takeflight/wagtail,Tivix/wagtail,taedori81/wagtail,nutztherookie/wagtail,dresiu/wagtail,chrxr/wagtail,nealtodd/wagtail,darith27/wagtail,tangentlabs/wagtail,mephizzle/wagtail,taedori81/wagtail,davecranwell/wagtail,nilnvoid/wagtail,hamsterbacke23/wagtail,nealtodd/wagtail,takeshineshiro/wagtail,kurtw/wagtail,Tivix/wagtail,Klaudit/wagtail,mikedingjan/wagtail,jnns/wagtail,taedori81/wagtail,quru/wagtail,janusnic/wagtail,tangentlabs/wagtail,serzans/wagtail,nrsimha/wagtail,bjesus/wagtail,Pennebaker/wagtail,kaedroho/wagtail,davecranwell/wagtail,mikedingjan/wagtail,takeshineshiro/wagtail,jnns/wagtail,darith27/wagtail,nutztherookie/wagtail,nimasmi/wagtail,gasman/wagtail,hanpama/wagtail,hamsterbacke23/wagtail,gasman/wagtail,Klaudit/wagtail,mayapurmedia/wagtail,kurtrwall/wagtail,kurtrwall/wagtail,iho/wagtail,chimeno/wagtail,jorge-marques/wagtail,hanpama/wagtail,rsalmaso/wagtail,nimasmi/wagtail,taedori81/wagtail,jordij/wagtail,JoshBarr/wagtail,iho/wagtail,mephizzle/wagtail,mjec/wagtail,serzans/wagtail,Klaudit/wagtail,hamsterbacke23/wagtail,mikedingjan/wagtail,FlipperPA/wagtail,mixxorz/wagtail,takeflight/wagtail,stevenewey/wagtail,chrxr/wagtail,quru/wagtail,marctc/wagtail,nimasmi/wagtail,nilnvoid/wagtail,gogobook/wagtail,nutztherookie/wagtail,quru/wagtail,chrxr/wagtail,tangentlabs/wagtail,rjsproxy/wagtail,nimasmi/wagtail,benjaoming/wagtail,willcodefortea/wagtail,jnns/wagtail,KimGlazebrook/wagtail-experiment,JoshBarr/wagtail,torchbox/wagtail,mixxorz/wagtail,thenewguy/wagtail,kurtw/wagtail,chimeno/wagtail,kaedroho/wagtail,nealtodd/wagtail,Pennebaker/wagtail,mixxorz/wagtail,iansprice/wagtail,kurtw/wagtail,jordij/wagtail,rv816/wagtail,jnns/wagtail,rv816/wagtail,inonit/wagtail,dresiu/wagtail,benjaoming/wagtail,timorieber/wagtail