find_by_permlink! on channels should not be case sensitive
added first! instead first to raise record not found instead undefined method for nil in some missing call
Merge pull request #360 from devton/master

find_by_permlink! on channels should not be case sensitive
Merge branch 'master' of github.com:catarse/catarse into fix_new_channel_home
removing unnecessary error handling and 'if'. Also fixed specs to reflect a simpler controller