discussions/show.html.haml: replace permissions check with cancan
discussions/show.html.haml: replace permissions check with cancan

digideskio/loomio,Collabforge/site-collabio,codingnutty/loomio,aca13jmf/loomio,tachyons/loomio,digideskio/loomio,tachyons/loomio,mlarghydracept/loomio,sicambria/loomio,sicambria/loomio,HadoDokis/loomio,doomergithub/loomio,Collabforge/site-collabio,Collabforge/site-collabio,wangjun/loomio,labhackercd/loomio,FSFTN/Loomio,juliagra/loomio,juliagra/loomio,tachyons/loomio,digideskio/loomio,FSFTN/Loomio,juliagra/DBCloomio,wangjun/loomio,mlarghydracept/loomio,piratas-ar/loomio,kimihito/loomio,FSFTN/Loomio,juliagra/DBCloomio,isomerase/loomio,mlarghydracept/loomio,mhjb/loomio,labhackercd/loomio,piratas-ar/loomio,doomergithub/loomio,isomerase/loomio,loomio/loomio,FSFTN/Loomio,tachyons/loomio,wangjun/loomio,aca13jmf/loomio,gvalerin/loomio,HadoDokis/loomio,HadoDokis/loomio,codingnutty/loomio,HadoDokis/loomio,annewchen/loomio,juliagra/DBCloomio,loomio/loomio,sicambria/loomio,piratas-ar/loomio,isomerase/loomio,mhjb/loomio,aca13jmf/loomio,annewchen/loomio,juliagra/loomio,gvalerin/loomio,mhjb/loomio,labhackercd/loomio,piratas-ar/loomio,Collabforge/site-collabio,codingnutty/loomio,loomio/loomio,loomio/loomio,gvalerin/loomio,kimihito/loomio,isomerase/loomio,annewchen/loomio,mhjb/loomio,sicambria/loomio,labhackercd/loomio,kimihito/loomio,doomergithub/loomio