Added documentation for usage of associative resources with form_for
Added documentation for usage of associative resources with form_for

lcreid/rails,riseshia/railsguides.kr,flanger001/rails,alecspopa/rails,tjschuck/rails,kmcphillips/rails,esparta/rails,tijwelch/rails,illacceptanything/illacceptanything,arunagw/rails,mathieujobin/reduced-rails-for-travis,maicher/rails,betesh/rails,Envek/rails,mechanicles/rails,betesh/rails,yahonda/rails,BlakeWilliams/rails,maicher/rails,rails/rails,georgeclaghorn/rails,rossta/rails,illacceptanything/illacceptanything,schuetzm/rails,bogdanvlviv/rails,BlakeWilliams/rails,esparta/rails,bradleypriest/rails,rails/rails,kmayer/rails,yawboakye/rails,untidy-hair/rails,repinel/rails,matrinox/rails,88rabbit/newRails,gauravtiwari/rails,brchristian/rails,ledestin/rails,utilum/rails,starknx/rails,kachick/rails,prathamesh-sonpatki/rails,Envek/rails,betesh/rails,deraru/rails,illacceptanything/illacceptanything,iainbeeston/rails,gfvcastro/rails,pschambacher/rails,untidy-hair/rails,marklocklear/rails,mtsmfm/rails,yasslab/railsguides.jp,koic/rails,Erol/rails,sealocal/rails,yahonda/rails,mohitnatoo/rails,pvalena/rails,georgeclaghorn/rails,arunagw/rails,coreyward/rails,betesh/rails,xlymian/rails,Sen-Zhang/rails,illacceptanything/illacceptanything,kmcphillips/rails,notapatch/rails,tgxworld/rails,sergey-alekseev/rails,Vasfed/rails,voray/rails,utilum/rails,ledestin/rails,kaspth/rails,MSP-Greg/rails,bolek/rails,gauravtiwari/rails,alecspopa/rails,jeremy/rails,notapatch/rails,iainbeeston/rails,kenta-s/rails,rails/rails,illacceptanything/illacceptanything,yawboakye/rails,gcourtemanche/rails,88rabbit/newRails,baerjam/rails,pvalena/rails,yasslab/railsguides.jp,rails/rails,vipulnsward/rails,coreyward/rails,deraru/rails,yawboakye/rails,prathamesh-sonpatki/rails,Stellenticket/rails,mechanicles/rails,stefanmb/rails,vassilevsky/rails,bradleypriest/rails,eileencodes/rails,voray/rails,Edouard-chin/rails,kirs/rails-1,felipecvo/rails,eileencodes/rails,EmmaB/rails-1,odedniv/rails,assain/rails,shioyama/rails,tijwelch/rails,riseshia/railsguides.kr,amoody2108/TechForJustice,lucasmazza/rails,printercu/rails,kddeisz/rails,rafaelfranca/omg-rails,amoody2108/TechForJustice,prathamesh-sonpatki/rails,palkan/rails,assain/rails,mohitnatoo/rails,printercu/rails,mtsmfm/railstest,marklocklear/rails,illacceptanything/illacceptanything,baerjam/rails,kddeisz/rails,bogdanvlviv/rails,travisofthenorth/rails,iainbeeston/rails,illacceptanything/illacceptanything,mohitnatoo/rails,jeremy/rails,EmmaB/rails-1,iainbeeston/rails,ttanimichi/rails,yalab/rails,brchristian/rails,illacceptanything/illacceptanything,schuetzm/rails,Stellenticket/rails,richseviora/rails,mtsmfm/railstest,stefanmb/rails,bogdanvlviv/rails,shioyama/rails,flanger001/rails,illacceptanything/illacceptanything,Spin42/rails,arjes/rails,gavingmiller/rails,fabianoleittes/rails,koic/rails,joonyou/rails,MSP-Greg/rails,kmcphillips/rails,rbhitchcock/rails,georgeclaghorn/rails,assain/rails,lcreid/rails,palkan/rails,vipulnsward/rails,aditya-kapoor/rails,tjschuck/rails,flanger001/rails,yasslab/railsguides.jp,yalab/rails,rafaelfranca/omg-rails,Erol/rails,gauravtiwari/rails,aditya-kapoor/rails,arunagw/rails,pschambacher/rails,joonyou/rails,koic/rails,kamipo/rails,samphilipd/rails,printercu/rails,vassilevsky/rails,MichaelSp/rails,notapatch/rails,Edouard-chin/rails,kmayer/rails,bradleypriest/rails,pvalena/rails,kachick/rails,palkan/rails,hanystudy/rails,prathamesh-sonpatki/rails,yahonda/rails,yawboakye/rails,Erol/rails,illacceptanything/illacceptanything,yalab/rails,tjschuck/rails,MSP-Greg/rails,tjschuck/rails,utilum/rails,xlymian/rails,felipecvo/rails,gcourtemanche/rails,elfassy/rails,vassilevsky/rails,BlakeWilliams/rails,notapatch/rails,tgxworld/rails,stefanmb/rails,palkan/rails,repinel/rails,BlakeWilliams/rails,illacceptanything/illacceptanything,Vasfed/rails,elfassy/rails,eileencodes/rails,88rabbit/newRails,kamipo/rails,mohitnatoo/rails,eileencodes/rails,tgxworld/rails,coreyward/rails,sealocal/rails,repinel/rails,rafaelfranca/omg-rails,yalab/rails,mathieujobin/reduced-rails-for-travis,odedniv/rails,untidy-hair/rails,shioyama/rails,rbhitchcock/rails,starknx/rails,fabianoleittes/rails,mechanicles/rails,felipecvo/rails,mijoharas/rails,jeremy/rails,assain/rails,yahonda/rails,rossta/rails,alecspopa/rails,mtsmfm/rails,brchristian/rails,printercu/rails,kenta-s/rails,illacceptanything/illacceptanything,samphilipd/rails,kenta-s/rails,tgxworld/rails,gfvcastro/rails,hanystudy/rails,aditya-kapoor/rails,Sen-Zhang/rails,riseshia/railsguides.kr,bogdanvlviv/rails,rbhitchcock/rails,Sen-Zhang/rails,sergey-alekseev/rails,MSP-Greg/rails,amoody2108/TechForJustice,Stellenticket/rails,yhirano55/rails,deraru/rails,deraru/rails,utilum/rails,riseshia/railsguides.kr,arjes/rails,kmayer/rails,odedniv/rails,sealocal/rails,pschambacher/rails,Vasfed/rails,richseviora/rails,kirs/rails-1,hanystudy/rails,arunagw/rails,Spin42/rails,richseviora/rails,kachick/rails,Erol/rails,bolek/rails,joonyou/rails,tijwelch/rails,starknx/rails,repinel/rails,elfassy/rails,bolek/rails,mathieujobin/reduced-rails-for-travis,gavingmiller/rails,ngpestelos/rails,maicher/rails,lucasmazza/rails,travisofthenorth/rails,mtsmfm/railstest,illacceptanything/illacceptanything,travisofthenorth/rails,lcreid/rails,kaspth/rails,vipulnsward/rails,yhirano55/rails,ngpestelos/rails,kirs/rails-1,travisofthenorth/rails,arjes/rails,mijoharas/rails,gcourtemanche/rails,lcreid/rails,ttanimichi/rails,gavingmiller/rails,lucasmazza/rails,illacceptanything/illacceptanything,ledestin/rails,shioyama/rails,MichaelSp/rails,Spin42/rails,baerjam/rails,Edouard-chin/rails,mechanicles/rails,MichaelSp/rails,schuetzm/rails,Stellenticket/rails,baerjam/rails,aditya-kapoor/rails,vipulnsward/rails,gfvcastro/rails,fabianoleittes/rails,rossta/rails,pvalena/rails,esparta/rails,fabianoleittes/rails,EmmaB/rails-1,xlymian/rails,sergey-alekseev/rails,mtsmfm/rails,untidy-hair/rails,mijoharas/rails,flanger001/rails,yhirano55/rails,kddeisz/rails,joonyou/rails,yhirano55/rails,Envek/rails,illacceptanything/illacceptanything,kaspth/rails,kmcphillips/rails,Vasfed/rails,voray/rails,ttanimichi/rails,Envek/rails,jeremy/rails,ngpestelos/rails,gfvcastro/rails,matrinox/rails,Edouard-chin/rails,kddeisz/rails,georgeclaghorn/rails,matrinox/rails,marklocklear/rails,esparta/rails,yasslab/railsguides.jp,schuetzm/rails,samphilipd/rails,kamipo/rails