explained how to use request_visible_actions for g+
g+ doc update

added request_visible_actions explanation and scope requirements for moment insert
g+ doc wording change
Add and reuse default options in resource providers
Merge pull request #270 from stloyd/feature/default_options

Add and reuse default options in resource providers
Adding dropbox support and the ability to set the signature method as PLAINTEXT
Cleanup dropbox feature
Merge pull request #262 from stloyd/feature/dropbox

Add dropbox support
Merge pull request #260 from mente/patch-1

explained how to use request_visible_actions for g+