Add implementation of Plurk service.
Fix compiling error for Plurk service.
Add Plurk demo app API key.
Better error handling and ask user to relogin when required.
Rewrite image uploading response handling using JSON.
Add Hatena Bookmark Sharer.
Fixed.
Update evernote-ios-sdk.
Rename sharer title.
set root view controller on main window
add facebook connect to root vc of demo and listen for notifications
Merge pull request #619 from cwhitesyp/rootvc

set root view controller on main window
Added GooglePlus iOS SDK
Adjusted project settings for Google Plus.
Added SHKGooglePlus.h/.m
Added basic features for Google Plus
Finished the Google Plus URL/Text sharing.
Added Google Plus settings to the Demo App.
Check for share type when choosing favorite items.
Use the com.instagram.exclusivegram UTI for Instagram.

More info: http://instagram.com/developer/iphone-hooks/
Relevant section: "Alternatively, if you want to show only Instagram in the application list (instead of Instagram plus any other public/jpeg-conforming apps) you can specify the extension class igo, which is of type com.instagram.exclusivegram."
Revert "Check for share type when choosing favorite items."

This reverts commit fbf480cf38750d9d5d861c7f46ab52d0db4cbb3d.
Determining Instagram availability inside canShare.