[#6] Comments model added
[#6] Bugfix on creating posts, and lame frontend for comments
[#6] Commenting hability added.
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments

Conflicts:
	app/admin/post.rb
	db/schema.rb
[#6] Fixed schema
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments

Conflicts:
	app/views/landing/post.html.erb
	config/routes.rb
	db/schema.rb
[#6] Redundant if deleted
[#6] Fixed schema
[#6] Fixed posts order to depend un publish date
[#6] Rspec and factory_girl gems installed
[#6] Rspec test added.
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments
[#6] Small fixes
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments

Conflicts:
	app/views/landing/index.json.rabl
	app/views/landing/post.html.erb
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments

Conflicts:
	app/controllers/landing_controller.rb
Merge branch 'feature/5_users_login' into feature/6_blog_post_comments

Conflicts:
	app/views/landing/post.html.erb
[#6] PR comments except new test
[#6] Search posts test added