add published_at to article, indicating when the article is published
this will allow saving article as draft
only show published atricle up front
minor cleanup, button set in table should be in single line
add button for publishing article on admins
fixed the latest migration, it should update 'published_at' not 'updated_at'
IMPORTANT BUGFIX!

updating tagged article without providing current tag values
should NOT clear the tags
change ads provider to bidvertiser
install sendgrid
remove bidvertising, it's ugly.. XD
minor ui sidebar alignment
activate "who-am-i"
forgot the Gemfile and initializer for squeel