Allow the retrieval of branch details
Pull request IDs are integers in the JSON response, so defensively convert to a string when building the URL
Don't roll over and die if there is more than one page on a paginated request without params
Fix 'browse' method and add a new 'files' method. Support 'path' parameter in both.
Merge pull request #23 from batterseapower/master

Two small bug fixes and a new feature (branch details)
Merge pull request #25 from batterseapower/list-repo-files

Bugfix Repo.browse and add a new 'files' method
Branches are a paginated resource, so they should be exposed like one