update rails_template.rb for rails 4.x
update rails_template.rb for rails 4.x

remove the "public/index.html" file only if it exist, rails 4.x don't have this file.
h2ocube/active_admin,sanyaade-iot/activeadmin,Amandeepsinghghai/activeadmin,artofhuman/activeadmin,hiroponz/activeadmin,saiqulhaq/activeadmin,dhartoto/activeadmin,buren/activeadmin,lampo/activeadmin,sanyaade-iot/activeadmin,shishir127/activeadmin,iuriandreazza/activeadmin,rubixware/activeadmin,gogovan/activeadmin,samvincent/active_admin,samvincent/active_admin,FundingGates/activeadmin,bcavileer/activeadmin,maysam/activeadmin,mediebruket/activeadmin,javierjulio/activeadmin,yeti-switch/active_admin,vraravam/activeadmin,jethroo/activeadmin,varyonic/activeadmin,sanyaade-iot/activeadmin,iuriandreazza/activeadmin,whatcould/active_admin,jclay/active_admin,westonplatter/activeadmin,danielevans/activeadmin,zfben/activeadmin,quikly/active_admin,SoftSwiss/active_admin,bolshakov/activeadmin,siutin/activeadmin,quikly/active_admin,temochka-test/activeadmin,sharma1nitish/activeadmin,ishumilova/activeadmin,Ibotta/activeadmin,thomascarterx/activeadmin,temochka-test/activeadmin,MohamedHegab/activeadmin,hyperoslo/activeadmin,cmunozgar/activeadmin,halilim/activeadmin,Davidzhu001/activeadmin,keichan34/active_admin,danielevans/activeadmin,maysam/activeadmin,Ryohu/activeadmin,dalegregory/activeadmin,Skulli/activeadmin,seanski/activeadmin,shishir127/activeadmin,Ryohu/activeadmin,maysam/activeadmin,dannyshafer/activeadmin,saveav/activeadmin,Davidzhu001/activeadmin,zfben/activeadmin,cmunozgar/activeadmin,mohitnatoo/activeadmin,siutin/activeadmin,Ryohu/activeadmin,mrjman/activeadmin,h2ocube/active_admin,hobbes37/activeadmin,hiroponz/activeadmin,chrisseldo/activeadmin,chdem/activeadmin,halilim/activeadmin,presskey/activeadmin,Amandeepsinghghai/activeadmin,alonerage/activeadmin,mateusg/active_admin,zfben/activeadmin,iuriandreazza/activeadmin,Pollywog23/activeadmin,quikly/active_admin,iguchi1124/activeadmin,jclay/active_admin,adibsaad/activeadmin,mediebruket/activeadmin,iuriandreazza/activeadmin,mauriciopasquier/active_admin,Some1Else/activeadmin,bloomrain/activeadmin,chdem/activeadmin,vytenis-s/activeadmin,Skulli/activeadmin,Some1Else/activeadmin,Some1Else/activeadmin,beyondthestory/activeadmin,whatcould/active_admin,jclay/active_admin,rtrepo/activeadmin,westonplatter/activeadmin,FundingGates/activeadmin,mynksngh/activeadmin,rtrepo/activeadmin,deivid-rodriguez/activeadmin,totzyuta/activeadmin,thomascarterx/activeadmin,ampinog/activeadmin,mohitnatoo/activeadmin,scarver2/activeadmin,mwlang/active_admin,alonerage/activeadmin,chrisseldo/activeadmin,iuriandreazza/activeadmin,presskey/activeadmin,krautcomputing/activeadmin,keichan34/active_admin,temochka-test/activeadmin,sharma1nitish/activeadmin,saveav/activeadmin,tf/activeadmin,buren/activeadmin,iguchi1124/activeadmin,presskey/activeadmin,dhartoto/activeadmin,seanski/activeadmin,danielevans/activeadmin,bloomrain/activeadmin,mateusg/active_admin,mediebruket/activeadmin,gogovan/activeadmin,samvincent/active_admin,tjgrathwell/activeadmin,dalegregory/activeadmin,alonerage/activeadmin,getkiwicom/activeadmin,activeadmin/activeadmin,senid231/activeadmin,strivedi183/activeadmin,saveav/activeadmin,hobbes37/activeadmin,mauriciopasquier/active_admin,scarver2/activeadmin,javierjulio/activeadmin,h2ocube/active_admin,chdem/activeadmin,ampinog/activeadmin,mrjman/activeadmin,rubixware/activeadmin,mohitnatoo/activeadmin,ishumilova/activeadmin,buren/activeadmin,westonplatter/activeadmin,Pollywog23/activeadmin,jethroo/activeadmin,dannyshafer/activeadmin,bolshakov/activeadmin,krautcomputing/activeadmin,tjgrathwell/activeadmin,deivid-rodriguez/activeadmin,mrjman/activeadmin,seanski/activeadmin,artofhuman/activeadmin,yijiasu/activeadmin,mynksngh/activeadmin,rubixware/activeadmin,thomascarterx/activeadmin,mateusg/active_admin,timoschilling/activeadmin,JeffreyATW/activeadmin,strivedi183/activeadmin,MohamedHegab/activeadmin,vytenis-s/activeadmin,davydovanton/activeadmin,tjgrathwell/activeadmin,activeadmin/activeadmin,Ibotta/activeadmin,Amandeepsinghghai/activeadmin,bolshakov/activeadmin,saiqulhaq/activeadmin,ishumilova/activeadmin,mwlang/active_admin,saiqulhaq/activeadmin,waymondo/active_admin,beyondthestory/activeadmin,hyperoslo/activeadmin,dhartoto/activeadmin,keichan34/active_admin,senid231/activeadmin,siutin/activeadmin,krautcomputing/activeadmin,JeffreyATW/activeadmin,bloomrain/activeadmin,wspurgin/activeadmin,iuriandreazza/activeadmin,javierjulio/activeadmin,senid231/activeadmin,adibsaad/activeadmin,hiroponz/activeadmin,JeffreyATW/activeadmin,totzyuta/activeadmin,Pollywog23/activeadmin,dannyshafer/activeadmin,vraravam/activeadmin,Andrekra/activeadmin,wspurgin/activeadmin,FundingGates/activeadmin,dalegregory/activeadmin,varyonic/activeadmin,shishir127/activeadmin,varyonic/activeadmin,whatcould/active_admin,Davidzhu001/activeadmin,yeti-switch/active_admin,applexiaohao/activeadmin,tf/activeadmin,applexiaohao/activeadmin,waymondo/active_admin,scarver2/activeadmin,deivid-rodriguez/activeadmin,mynksngh/activeadmin,mwlang/active_admin,Skulli/activeadmin,vraravam/activeadmin,cmunozgar/activeadmin,hobbes37/activeadmin,timoschilling/activeadmin,vytenis-s/activeadmin,gogovan/activeadmin,applexiaohao/activeadmin,getkiwicom/activeadmin,Ibotta/activeadmin,adibsaad/activeadmin,bcavileer/activeadmin,SoftSwiss/active_admin,waymondo/active_admin,lampo/activeadmin,MohamedHegab/activeadmin,getkiwicom/activeadmin,rtrepo/activeadmin,tf/activeadmin,iguchi1124/activeadmin,iuriandreazza/activeadmin,yijiasu/activeadmin,yijiasu/activeadmin,mauriciopasquier/active_admin,SoftSwiss/active_admin,bcavileer/activeadmin,lampo/activeadmin,Andrekra/activeadmin,artofhuman/activeadmin,activeadmin/activeadmin,strivedi183/activeadmin,jethroo/activeadmin,Andrekra/activeadmin,chrisseldo/activeadmin,halilim/activeadmin,totzyuta/activeadmin,hyperoslo/activeadmin,sharma1nitish/activeadmin,yeti-switch/active_admin,davydovanton/activeadmin,ampinog/activeadmin,davydovanton/activeadmin,wspurgin/activeadmin,beyondthestory/activeadmin,timoschilling/activeadmin