add model and migration for articles
blog finished, still need to add user functionality
add user model and migration
changes to database file, hopefully fix problem with heroku
user signin and signout
can add blog posts
add line so stylesheet will be included in deployment to heroku
add line so stylesheet will be included in deployment to heroku
fix broken link in edit page
fix ability to add comments
comments can be left
add tags
search by tag
add link to sort by tag
improve navigation on signin
add restricted access for deleting comments
improve homepage navigation