Patch podspec circular dependency

To workaround #983, https://github.com/CocoaPods/Molinillo/issues/6, https://github.com/CocoaPods/Molinillo/issues/13 and https://github.com/CocoaPods/Specs/issues/12819#issuecomment-65180133, https://github.com/CocoaPods/Specs/issues/12816: 

* Move NoARC Core sources to a separate folder	d6c6af6
* "Merge" ARC and NoARC Core subspecs to patch circular dependencies	f6975f0

Also bumped podspec version but it won't validate because at least OneNote is broken and needs to be fixed before it can be `pod trunk push`ed to CocoaPods.

In the mean time people can try using CocoaPods 0.35.x with:

`pod 'ShareKit', :git => 'https://github.com/rivera-ernesto/ShareKit.git', :commit => '6e3ad2761cca75ee3f1a12883d1ba4bfb2855874'`

In general it is impossible to tell at a glance where thinks get broken and if pull requests and commits brake some subspec/module. That is the reason why #939 was made to integrate CI to commits and pull requests...