add tags, post_tags and setup relationship with post
fixed merge conflict in users edit.html.erb
posts controller update
Merge pull request #29 from marklc44/master

tag model, post_tag model and post model many to many associations
Merge pull request #30 from indotek68/master

posts controller update
moved comment code from index to show
Merge pull request #31 from indotek68/master

moved comment code from index to show
adds Users, and Posts to seed file work with
Merge branch 'master' into work

merging in anggas post correction