Use DjangoJSONEncoder for encoding form submission
Use DjangoJSONEncoder for encoding form submission

Fixes #798

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