add is_admin status to users table
Merge pull request #4 from akacraigstr/ks-admin-status

add is_admin status to users table
fixing my name (katherin)

thanks adam.
Added Post Model
  *belongs to a user
  *has content, id, user_id
  *created a create method for PostsController
  *Added A Post Route for user(show) and posts (create only)
  *Added A new post variable to user show
Added Suggestions & Corrected Errors
Added Erics Changes