* [Visual] remove visual flag and tidy up code
* - added basic loading ui test
* change material namespaces to be Xamarin.Forms.Material.<Platform>
* api 19 fixes
* fix casing on resources
* [Shell] The glorious Shell
* set the flag for the test
* remove the FastRenderer flag
* [Android] If we were disposed earlier Element can be null and Control was disposed
* [Controls] Seems part of #2520 was solved so we don't need this
* [iOS] Fix NRE on the ScrollviewTracker
* add missing constructor for RenderWith
* [Core] propagate visual/flow through shell
* use interlock increment
* hide IDataTemplateController
* [Android] Fix TableViewModelRenderer dispose
* [Core] propagate visual/flow direction through shell hierarchy
* [Android-Gallery] removed some left in settings changes that effect UI Tests
* [iOS,Droid,Core] Code formatting
* [iOS,Core] Last minute style refactoring
* Visual
* add progress bar and fix ui tint color
* Progress Bar Updates
* ios padding fixes
* padding fix and button image positioning fixes
* added button themes
* disable tint and open up material android button
* change image to bank
* add overrides for Material Frame Renderer
* remove commented out code
* change back to Full linker
* applying comment fixes
* change comparison
Rui Marinho
Shane Neuville
Stephane Delcroix