* [Controls] Improve sample for MacOS control gallery, add a storyboard for the menu
* [Core] Add QuitApp to platform services
* [Core] Add ClickedGestureREcognizer
* [MacOS] Implement ClickGestureRecognizer
* [Core] Add MainMenu
* [MacOS] Implement Main top menu
* [Controls] Add desktop support test page
* [MacOS] Update menu items if they change
* [MacOS] Refactor to make it build for iOS
* [Core] Add Menu attached property to Element
* [MacOS] Implement MacOS context menu
* [Core] Fix type of ADP
* [Core] Add Accelerators to MenuItem
* [ControlGallery] Add example for Accelerator MenuItems
* [Core,iOS] Update ClickedEventArgs to ButtonMask enum
* [Docs] Update docs
* [Core]Fix build error
* [WP8] Implement QuitApp
* [WP8] Log warning instead of throw
* [Tests] Add unit tests for menu and menuitem
* [Docs]Update docs
* Update build submodule
* [Core,MacOS,Docs] Use Attached Property for MainMenu
* [Core] Update ButtonsMask, reduce calls to GetValue getting parameter
* [All] Use Accelerator class
* [Core] Add tests for accelerator
* [All] Move QuitApp to QuitApplication
* [Core, Tests] Add more tests for Accelerator
* [Core]Parse win modifier also
* [UnitTests] Fix TestCaseSource
* [MacOS,Core] Fix typo on Modifiers
* [MacOS] Fix typo
* [WinRT] Fix build
* [Docs] Update docs
* Remove InternalsVisibleTo from Core to XF.Platforms.*
* Changes per Jason's code review
* Move LockableObservableListWrapper to internals namespace
* Changes per Stephane's code review
* update docs
* Touch code to get CI to run tests
* Rebase; Update documentation
* iOS and Android timers should be runnable from any thread and executed on the main thread
* removing unused Timer class declarations with minor refactoring efforts
* iOS and Android timers should be runnable from any thread and executed on the main thread
* removing bak file
* switch to v7
* add test code
* Make core Ticker abstract and public
Make the core Ticker abstract and public so it can be inherited by platform
implementations; remove now-unused parts of original Ticker; add CreateTicker
to IPlatformServices; remove unused CreateTimer methods from IPlatformServices
* Add docs for Ticker
* Remove unnecessary Ticker.Default set
* Move Ticker into Internals
* Update Ticker docs
* Remove old Ticker docs
* Remove commented code