2.1.0 Release

Update to latest 3.4.0 Android native SDK and Unity 5.4 fixes

• Updated to latest 3.4.0 Android native SDK.
  • Google Project number use from OneSignal server settings instead of local.
  • Supports background image alignment.
  • Send priority effects display priority
• Unity 5.4 bug fixes
  • iOS - Android files were being included in the Xcode project.
    • Set meta import settings to include Android only on Android/OneSignalConfig folder.
• Android
  • Updated to v1.2.2 of unity-jar-resolver to fix menu not showing.