Pictures, Posts, Snippets, Comments functional

Pictures
==========
- a user can now upload a profile pic
- posts and snippets can include  images
- we have to update our schema to limit snippets to just one picture

Posts and Snippets
============
Index
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- can see all posts/snippets along with comments
- can click on a post title to navigate to the a specific post's show page (we should discuss how our users will be able to navigate to a specific snippet)
- if you are the current user and are on your own posts/snippets page you can click on the "create a new post/snippet" button to do so.

Show
-------------------
- displays a post/snippet along with its comments
- you can : 
  + add a comment 
  + edit a post/snippet
  + delete a post/snippet (I will be working on limiting this functionality to only the creator of the post/snippet)

Edit
---------
- edit form is rendered