Added flickr, dropbox class, settings view

- Added a structured flickr class which is a wrapper for FlickrKit
- Dropbox will be wrapper for Dropbox SDK, still incomplete
- Setting view shows accounts currently logged in or out
Refactoring
Merge branch 'master' into Harsh

Conflicts:
	SharePic.xcodeproj/project.pbxproj
	SharePic/HRSelectProfileViewController.m
Merge pull request #9 from shahmharsh/Harsh

Added flickr, dropbox class, settings view