Get log for a project

Return git log for a given repository.
Json marshalling error should be http.StatusInternalServerError
Merge pull request #153 from marcelometal/getlog

Get log for a project
Removing repository tree with path on url (path will be passed by querystring)
Merge pull request #155 from guilhermebruzzi/master

Removing repository tree with path on url
Release 0.5.0
Increase coverage of the api package
Support namespaces
Merge pull request #154 from scorphus/namespaces

Support namespaces for repository
Improve code readability by explaining a validation regex