Update guide to be based on Rails 3.1.
Update guide to be based on Rails 3.1.

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