slug
Merge branch 'new_links' of github.com:SBS-team/ruby-blog into ISVALID_2_new_style
fix friendly_id
Merge branch 'dev' of github.com:SBS-team/ruby-blog into ISVALID_2_new_style
Merge pull request #14 from SBS-team/ISVALID_2_new_style

Isvalid 2 new style