Minor changes in commit list to improve design and fix PR display issue
Some fixes on tree list as well
Take care of PRs links
Fix display on docs repo
Remove min-witdh so display is OK on smaller screens
Merge #5 `Min-width issue`
Add a unique message identifier for the email sent about a pull-request
Add a new notification method meant to send emails upon new pull-request
Notify people involved in the project when a new pull-request is created

Fixes http://209.132.184.222/progit/issue/18
Render comments using markdown
Add SQL relations between the GlobalId table and the Project/Issue/PullRequest one
Merge #6 `Use markdown to render comments`
Add notification method that sends an email when a pull-request is merged
Notify when a  pull-request is closed