Added placeholder text color property to ExtendedEntry and implemented it on iOS
Added ExtendedEntryRenderer for Android supporting  PlaceholderTextColor property
Added attachment capabilities to iOS EmailService
Merge commit '8a068161d39be70445b87198918045854ad397cc'

Conflicts:
	src/Xamarin.Forms.Labs/Xamarin.Forms.Labs.Droid/Xamarin.Forms.Labs.Droid.csproj
Added ExtendedEntry in Xamarin.Forms.Labs.Droid project.
Fix casing issue on iOS device for fonts folder
GridView refactoring better fix for #236
Merge pull request #290 from Applifting/master

ExtendedEntry - Added text placeholder color (iOS, Android)
New DataSource property
Merge pull request #291 from Snorvisable/master

New DataSource property
Updated changes from master
Completed testing of EmailService Attachments o iOS
Fixes to NuGet packages + extensions

Fixed TinyIOC & ServiceStack package configs.

https://github.com/XForms/Xamarin-Forms-Labs/issues/283#issuecomment-549
89569

Added some extensions to convert native views to images etc.
Fix to ServiceStack serializer

https://github.com/XForms/Xamarin-Forms-Labs/issues/294

Updated unit test projects. Cleanup on HybridWebView.
Tuple support for ServiceStack Droid & WP8
Added ReleaseBuild to ignore

https://github.com/XForms/Xamarin-Forms-Labs/issues/299
Update to Xamarin Forms 1.2.3 pre2
Removed BT from iOS build and device

https://github.com/XForms/Xamarin-Forms-Labs/issues/296
Revert  to Xamarin Forms pre1 #298
Merge branch 'master' of https://github.com/XForms/Xamarin-Forms-Labs