Merge pull request #1 from ktintc/master

Make oauth2 boto plugin work on GCE
- Remove gstuil specific client_id and client_secret to make the plugin
  reusable by other apps. These credentials can be taken from the boto
config or enviroment variables.
- Remove gsutil specific comments.
- Remove adding third_party libs to the path as we're installing them
  anyways.
- Bumping up the version to 1.2 (accidentally got reverted in my
  previous change)
Merge pull request #3 from ktintc/client_ids

Remove gsutil specific client_id and client_secret to make the plugin reusable.
Fix missing newline for markdown rendering.
Better exception handling, fix broken import
Merge remote-tracking branch 'upstream/master'

Conflicts:
	oauth2_plugin/oauth2_helper.py