Create 'Add Task' link on project/view page

Found the workflow a bit strange to add a task to a project, so I added a link to do so directly on the project/view/:id page.
![screen shot 2013-07-26 at 2 38 20 pm](https://f.cloud.github.com/assets/354842/865500/b7302992-f63b-11e2-814d-b8a8edfb4160.png)