Change namespace to github/hub
Fix git related tests

Make tests less fragile by introducing a test git repo
Don't use --binary for travis
Use absolute path for fixture
Extract to fixtures.SetupTestRepo()
Clone test repo instead of querying on top of it
Remove test.git
Add test.git
Change test to use the new fixture
More comments on caching pwd
Explain more on pwd
Merge pull request #482 from github/fix_go_tests

Fix go tests