Interim checkin -- most of the auth refactor is done
Fleshing out RestAPIExplorer
Refactoring the parent app delegate out of native apps
Merge remote-tracking branch 'upstream/unstable20' into native_app_refactor
Adding auth-on-demand to SFRestAPI.
Merge pull request #272 from khawkins/native_app_refactor

Refactoring parent app delegate out of native apps