update rails documentation
update rails documentation

AlexVPopov/money,maicoin/money,gregoryhappyfresh/money,saizai/money,paulodiniz/money,bonusly/money,BrandyMint/money,printercu/money,RubyMoney/money,kewaunited/money,insphire/money,antstorm/money,richardvenneman/money,bnmrrs/money,pixeltrix/money,envato/money,nilbus/money