Fixed number passed as 0 in some cases

Added custom data (setCustom/getCustom) methods for local notifications

Added custom data to push notifications

Added PHP push server example

Android - made event related variables thread safe

Android - does not dispatch notification when app is in forground, instead dispatched internal Lua event (same as IOS)

Android - notifications get cleared after click on them

Fixed crash when opening app with notification

Fixed repeating local notifications