docs(README): remove reference to bitdeli analytics
docs(README): remove reference to bitdeli analytics

see: http://blog.bitdeli.com/post/77717727361/on-githubs-image-proxy

Kpler/bootstrap,ehteshamkafeel/bootstrap,martin-brennan-csnet/bootstrap,stereocilia/bootstrap,elancom/bootstrap-1,rgolea/bootstrap,yubin-huang/bootstrap,wuwei111467/bootstrap,ccslakey/bootstrap,Lexxville/bootstrap-1,2363140194/bootstrap,matteopic/bootstrap,pkdevbox/angular-ui-bootstrap,spadgett/bootstrap,patrick91/bootstrap,cgvarela/bootstrap-1,reiniergs/bootstrap,vlajos/bootstrap,parikmaher534/bootstrap,wesleycho/bootstrap,marklagendijk/bootstrap,yubin-huang/bootstrap,noellejung/bootstrap,kmccaw/bootstrap,bikegriffith/bootstrap,benhalverson/bootstrap,hyoda/bootstrap,rajesh-frontendengineer/bootstrap-1,pkdevbox/angular-ui-bootstrap,yong1236/angular-ui-bootstrap,eduncan26/bootstrap,Servoy/bootstrap,codedogfish/angular-ui-bootstrap,AgDude/bootstrap,cdrewery/bootstrap,atulc007/bootstrap-1,woshiyigebing/bootstrap,shihang0001/bootstrap,DenisCloutier/bootstrap,synapscommerce/bootstrap,Real-Currents/ui-bootstrap,inoxis91/bootstrap,connyay/bootstrap,davereed/bootstrap,yonglehou/bootstrap-1,cgvarela/bootstrap-1,yangcwGIT/bootstrap,ahsanbagwan/bootstrap,WXwangxin/bootstrap,corystevens/bootstrap,MikhailNazarov/bootstrap,tmcgee123/bootstrap,drocbuster/My_AngularJS_Repo,nathan-j-brenner/bootstrap-1,mufl1h/bootstrap,nathan-j-brenner/bootstrap-1,BookingBug/bootstrap,spadgett/bootstrap,eduncan26/bootstrap,Bugagazavr/bootstrap,elijah513/bootstrap,cesarmarinhorj/AngularJS-bootstrap,techkrish/bootstrap,fjg1989/bootstrap,Farael49/bootstrap,Emobe/bootstrap,elancom/bootstrap-1,DenisCloutier/bootstrap,VoltiSubito/bootstrap,icfantv/bootstrap,fernando-sendMail/bootstrap,Schibum/bootstrap,vsternbach/bootstrap,tobigun/bootstrap,npatelseamless/ghs-typeahead,yukisan/bootstrap,sullivanpt/bootstrap,josheche/bootstrap-1,andrepitombeira/bootstrap,akinsony/bootstrap,carlosjunior/bootstrap,jczerwinski/bootstrap-1,connyay/bootstrap,shootermv/bootstrap,shadowdaw/bootstrap,shihang0001/bootstrap,filipkis/bootstrap,impulso-animado/bootstrap,Jchavez/bootstrap-1,xzoth/bootstrap,liiza/bootstrap,mohuk/bootstrap,KingMario/bootstrap-1,ChinnasamyM/bootstrap,elijah513/bootstrap,WXwangxin/bootstrap,292388900/bootstrap,Nekle/bootstrap,JonFerrera/ui-bootstrap,xiwc/bootstrap-1,shootermv/bootstrap,imskojs/bootstrap,suryasingh/bootstrap,dsisejkovic/bootstrap,looker/bootstrap,reinisp/bootstrap,alokpradhan/bootstrap,nobitagit/bootstrap,birdy-/bootstrap,krossoverintelligence/bootstrap,vfiles/bootstrap,Crunch-io/bootstrap,guaerguagua/bootstrap,azahreba/bootstrap,MetSystem/bootstrap,sandeepkaturi/report-manage-of-bootstrap,andreialecu/bootstrap,rgolea/bootstrap,looker/bootstrap,kongx73/bootstrap,yong1236/angular-ui-bootstrap,codedogfish/angular-ui-bootstrap,linuxvom/bootstrap,ahsanbagwan/bootstrap,gbasto/bootstrap,andreialecu/bootstrap,JonathanGawrych/bootstrap,SandeepSikhakolli/bootstrap,stereocilia/bootstrap,2363140194/bootstrap,liqingzhu/bootstrap,noellejung/bootstrap,infowrap/bootstrap,rasulnz/bootstrap,voyagecontrol/bootstrap,DiHuang1986/bootstrap,netanelgilad/bootstrap-1,daviesgeek/bootstrap,kaizenplatform/angular-ui-bootstrap,angular-ui/bootstrap,leyanlo/bootstrap,thalen/bootstrap,dabos-GFI/angular-ui-bootstrap,ThePenguin1140/semantic-angular,freejavaster/bootstrap,lancerushing/bootstrap,GirishKumrawat/bootstrap,justin-john/bootstrap-1,KingMario/bootstrap-1,wesleycho/bootstrap,bleggett/bootstrap,SimilarWeb/bootstrap,pkdevbox/bootstrap-1,yjukaku/bootstrap,softgrad-dev2/angular_demo,suryasingh/bootstrap,Lincoln-xzc/angular-ui-bootstrap,saputro-dwy/bootstrap,mikesavior/bootstrap,deeg/bootstrap,Zazulei/bootstrap,hxtpoe/bootstrap,drocbuster/My_AngularJS_Repo,Real-Currents/ui-bootstrap,kirning/bootstrap-1,292388900/bootstrap,themifycloud/bootstrap,hxtpoe/bootstrap,bleggett/bootstrap,LogicState/bootstrap,mohuk/bootstrap,iamcbh/bootstrap,miiihi/bootstrap,ksheedlo/bootstrap,dgoncalves1/bootstrap,akinsony/bootstrap,cgat/bootstrap,martin-brennan-csnet/bootstrap,guaerguagua/bootstrap,SystemDisc/bootstrap,zen4s/UIBootstrap,Lexxville/bootstrap-1,chrisirhc/angular-ui-bootstrap,deeg/bootstrap,Farael49/bootstrap,Anirudhk94/bootstrap,DiHuang1986/bootstrap,jackRogers/bootstrap,davincho/bootstrap,cgat/bootstrap,fpipita/bootstrap,fpipita/bootstrap,fmccown/bootstrap,ljantzen/bootstrap,zen4s/UIBootstrap,opentable/angular-ui-bootstrap,mikesavior/bootstrap,qpitlove/bootstrap,azahreba/bootstrap,mufl1h/bootstrap,inukshuk/bootstrap,antoinepairet/bootstrap,minzen/bootstrap,kirning/bootstrap-1,burlhock/bootstrap,RobJacobs/bootstrap,pbrewer/bootstrap,oliversalzburg/bootstrap,jordangraft/bootstrap,qpitlove/bootstrap,buchslava/bootstrap,davious/angular-ui-bootstrap,pdsoftplan/bootstrap,maxfierke/angular-ui-bootstrap,rhamid/bootstrap-1,kaizenplatform/angular-ui-bootstrap,wonderflow-bv/bootstrap,thomassorensen/bootstrap,filipkis/bootstrap,Gailby/bootstrap,Zazulei/bootstrap,sandeepkaturi/report-manage-of-bootstrap,JDeuker/bootstrap,Kpler/bootstrap,MetSystem/bootstrap,dmc2015/bootstrap,mykhaylo-/bootstrap,tradingscreen/bootstrap,edivancamargo/bootstrap,softgrad-dev2/angular_demo,Foxandxss/boots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iamcbh/bootstrap,leyanlo/bootstrap,linuxb/bootstrap,benhalverson/bootstrap,bqevin/bootstrap-1,vlajos/bootstrap,dmc2015/bootstrap,zhaokunfay/bootstrap,eftakharali/bootstrap,kemapak/bootstrap