Add frameworks & public header files to CocoaPod and XCProject

Added following frameworks to Cocoapods and XCProject configurations:

* Foundation
* SystemConfiguration
* CoreTelephony
* CoreLocation
* UIKit

Also, included all Liquid files into "public_header_files".

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>
Add CoreGraphics as dependency

Signed-off-by: Miguel M. Almeida <miguelcma@gmail.com>