GoogleOAuth2 support (login with --auth option)

This is a not yet completed fix for OAuth2 (https://github.com/mher/flower/issues/229):

 - some hardcoded values should be put in settings.
 - login always redirect to home page
Celery 3.2 will not longer have celery.utils.compat:OrderedDict
Merge pull request #230 from ask/master

Celery 3.2 will not longer have celery.utils.compat:OrderedDict
Refactor pool grow/shrink api
Fix pool grow/shrink api tests
Fix python 2.6 tests
Add ordereddict to python 2.6 dependencies
Read OAUTH2 credentials from environment variables
fix easy_install install command

probably a typo
Merge pull request #239 from yetanotherportfolio/patch-1

fix easy_install install command
Add --conf option to change the default config file name
Document --conf option
Add option crossreferences
Merge branch 'master' of github.com:mher/flower
Improve docs formatting
Update AUTHORS
Merge pull request #241 from yetanotherportfolio/patch-2

Update AUTHORS
Remove Bitdeli badge
Import default modules at startup #200
Added API resource to get seen task types

Added GET /api/task/types so we can get the list of seen task types
from the API.
Added missing authentication decorator.
Added PyCharm to .gitignore