Workaround for iOS 4.3 bug
Workaround for iOS 4.3 bug

Replacing the paragraph style attribute requires that we remove the previous attribute first or else CoreText does not release the previous CTParagraphStyleRef. Fixed in iOS 5.0.

closes #160

trispo/DTCoreText,wordnik/DTCoreText,shwetsolanki/DTCoreText,appunite/DTCoreText,rgregg/DTCoreText,programming086/DTCoreText,yaoxiaoyong/DTCoreText,shuoshi/DTCoreText,CoderJWYang/DTCoreText,ibru/DTCoreText,artifacts/DTCoreText,danielphillips/DTCoreText,kemenaran/DTCoreText,Cocoanetics/DTCoreText,beingenious/DTCoreText,liuslevis/DTCoreText,ricobeck/DTCoreText,siuying/DTCoreText,appunite/DTCoreText,sidslog/DTCoreText,bastianh/DTCoreText,barz/DTCoreText,DanGe42/DTCoreText,esteluk/DTCoreText,ricobeck/DTCoreText,brightec/DTCoreText,MattKiazyk/DTCoreText,wangmb/DTCoreText,AmberWhiteSky/DTCoreText,canyu9512/DTCoreText,Cocoanetics/DTCoreText,yifan/DTCoreText,smartlogic/DTCoreText,hkg36/DTCoreText_amen_mod,bnickel/DTCoreText,SanjoDeundiak/DTCoreText,pegli/DTCoreText,gamma/DTCoreText,pegli/DTCoreText,wweiradio/DTCoreText,gsempe/DTCoreText,Akylas/DTCoreText,rdougan/DTCoreText,liulinjian/DTCoreText,zulip/DTCoreText,gank0326/CoreTextWithHTML,pegli/DTCoreText,SanjoDeundiak/DTCoreText,gamma/DTCoreText,z8927623/DTCoreText,goodheart/DTCoreText,trispo/DTCoreText,siuying/DTCoreText,trispo/DTCoreText,wangmb/DTCoreText,rgregg/DTCoreText,wordnik/DTCoreText,gank0326/CoreTextWithHTML,xiaoyanit/DTCoreText,1yvT0s/DTCoreText,unisontech/DTCoreText,badoo/DTCoreText,artifacts/DTCoreText,jogloran/DTCoreText,hkg36/DTCoreText_amen_mod,wweiradio/DTCoreText,ipodishima/DTCoreText,Cocoanetics/DTCoreText,holgersindbaek/DTCoreText,goodheart/DTCoreText,gnr/DTCoreText,wordnik/DTCoreText,ipodishima/DTCoreText,ibru/DTCoreText,smartlogic/DTCoreText,bnickel/DTCoreText,AmberWhiteSky/DTCoreText,yifan/DTCoreText,canyu9512/DTCoreText,pivotaltracker/DTCoreText,devontech/DTCoreText,badoo/DTCoreText,devontech/DTCoreText,cnbin/DTCoreText,danielphillips/DTCoreText,rdougan/DTCoreText,z8927623/DTCoreText,artifacts/DTCoreText,kemenaran/DTCoreText,rain1988/DTCoreText,wlisac/DTCoreText,davbeck/DTCoreText,artifacts/DTCoreText,beingenious/DTCoreText,jogloran/DTCoreText,depl0y/DTCoreText,Torsph/DTCoreText,jingchunYuan/DTCoreText,DanGe42/DTCoreText,iwakevin/DTCoreText,sujeking/DTCoreText,rdougan/DTCoreText,mirego/DTCoreText,i-miss-you/DTCoreText,sujeking/DTCoreText,iwakevin/DTCoreText,depl0y/DTCoreText,tonycn/DTCoreText,youprofit/DTCoreText,thusfresh/DTCoreText,Esdeath/DTCoreText,OliverLetterer/DTCoreText,cnbin/DTCoreText,zulip/DTCoreText,bastianh/DTCoreText,tonycn/DTCoreText,openresearch/DTCoreText,rain1988/DTCoreText,unisontech/DTCoreText,w2592583/DTCoreText,MattKiazyk/DTCoreText,mirego/DTCoreText,davbeck/DTCoreText,wlisac/DTCoreText,shuoshi/DTCoreText,brightec/DTCoreText,niklassaers/DTCoreText,beingenious/DTCoreText,barz/DTCoreText,qskycolor/DTCoreText,qskycolor/DTCoreText,Akylas/DTCoreText,danielphillips/DTCoreText,yifan/DTCoreText,liulinjian/DTCoreText,i-miss-you/DTCoreText,OliverLetterer/DTCoreText,niklassaers/DTCoreText,jingchunYuan/DTCoreText,jjamminjim/DTCoreText,thusfresh/DTCoreText,1yvT0s/DTCoreText,gsempe/DTCoreText,wweiradio/DTCoreText,siuying/DTCoreText