Merge pull request #112 from r1chardj0n3s/urls-modules

more explicit, less complicated URL configuration
Instead of -infinity use NULL for date_joined and default to now()
Add the database tables and models for warehouse.accounts
Start working on a user profile page

* Adds a gravatar_url helper function
* Adds a view that will render a profile page for a user
* Adds a basic template to start with
Add models and tables to allow fetching all packages a user has a role for
List the projects a user has roles for on their project page
Update render_response tests to handle gravatar_url
UnicodeText cannot accept the length parameter
Properly generate the join
We need only a simpler heading
Remove unused import
Match the new naming scheme
Rename user_detail to user_profile
Enable caching with Fastly
Test the user profile feature and the support code for it

* Tests include
  * account models
  * packaging models
  * account views
* Fix bugs identified in testing
style fixes
Merge pull request #113 from dstufft/user-profile

Add a user profile view
Merge warehouse.ui with warehouse.packaging

The warehouse.ui package was really just implementing the packaging
related UI. It makes more sense to just keep that inside the
packaging module then keeping them apart.
Merge pull request #114 from dstufft/merge-ui-packaging

Merge warehouse.ui with warehouse.packaging
Warn the user when the version they are viewing is not the latest