Increase buckets and object pagination to maximum to speed up tab completion
Add optional logging for tab completion
Remove double-gzipped files correctly when hash validation fails
Fix if-generation-match:0 for XML API
Fix apitools exception when resetting debuglevels
Minor changes to creating service account.

And change to use "Google Developers Console".  For service account, we could also point to https://cloud.google.com/storage/docs/authentication#service_accounts for more information.
Remove "tab".
Merge pull request #231 from marcgel/master

Updates to getting service account.
Allow sub-commands.
Style fixes.
Fix loop.
Rename back to parser.
.
Document exception.
Unit tests WIP.
Finish completer unit tests.
Fix bad completer test.
Add some docstrings to fakes.
Style fixes.
Use unused kwargs instead of lint directive.