Remove escape_key(), does not work on Ruby 1.8.6
Remove escape_key(), does not work on Ruby 1.8.6

linyows/dalli,naseem/dalli,mcansky/dalli,alindeman/dalli,reverbnation/dalli,retailnext/dalli,freeatnet/dalli,vipulnsward/dalli,arthurnn/dalli,jjb/dalli,jaxi/dalli,eileencodes/dalli,jwinter/dalli,mrb/dalli,dblock/dalli,jonhinson/dalli,mdesjardins/dalli,murtuzakz/dalli,jcxplorer/dalli,rafaelfranca/dalli,hbu50/dalli,cluesque/dalli,nitinstp23/dalli,mumoshu/dalli,bpardee/dalli,StreetEasy/dalli,ig0774/dalli,danielribeiro/dalli,petergoldstein/dalli,tmm1/dalli,godfat/dalli,petergoldstein/dalli,dplummer/dalli,pjg/dalli,Tapjoy/dalli,akihiro17/dalli,uzzz/dalli,seamusabshere/dalli,sandys/dalli,igreg/dalli,kei-s/dalli,alevy/dalli,joshwlewis/dalli,ScotterC/dalli,eagletmt/dalli,blueboxgroup/dalli,dtakahas/dalli,wjordan/dalli,stefanwille/dalli,chendo/dalli,exact/dalli,cjbottaro/dalli,ahawkins/dalli,sanemat/dalli,mperham/dalli,mcka1n/dalli,leonid-shevtsov/dalli,amdtech/dalli,crigor/dalli,steveklabnik/dalli,dannyfallon/dalli,hirocaster/dalli,jkriss/dalli,nthj/dalli,indirect/dalli,nbibler/dalli,eliaslevy/dalli,shaiguitar/dalli,indabamusic/dalli,avsej/dalli,tlemburg/dalli,glenngillen/dalli,IFTTT/dalli