Remove itemId parameter from restoreTransactionsStarted bridge method to match header signature

Otherwise an UnsatisfiedLinkError is thrown and the Android app crashes when a user tries to restore his purchases
Merge pull request #16 from alexleutgoeb/patch-1

Remove itemId parameter from restoreTransactionsStarted

Thanks @alexleutgoeb
Update README.md
Added support for multiple event handlers in CCSoomla (add/removeEventHandler)
Added support for a onStoreControllerInitialized event
Used Cocos2d-x macros for logging
Fixed event handling on the Java side
Updated readme
Fixed code tags
Nitpicks
More Fixes
More fixes
More fixes
Added instructions on cloning the jansson library
Fixed first line(s)
Fixed link to SOOMLA website
Added hyperlinks
Fixed links
Replaced submodules with SOOMLA's submodules
Added a way to set Android public key