Merge pull request #441 from sami1971/master

Fix for Android HybridWebView load finished
Started playing with extended label
Added Template Selector

Added TemplateSelector.cs
Integrated TemplateSelector with RepeaterView
Added TapGesture Command to RepeaterView
First Pass refactoring of RepeaterView
Merge branch 'master' into extended-label

Conflicts:
	src/Xamarin.Forms.Labs/Xamarin.Forms.Labs/Controls/ExtendedLabel.cs
Add iOS Placeholder support to the ExtendedLabel
Corrected issus with nuget packages and assembly references that were causing build issues in Visual Studio.
Merge pull request #445 from chrisriesgo/extended-label

ExtendedLabel Placeholder
Merge pull request #443 from Choran66/master

Added Template Selector
Update README.md
Merge pull request #447 from chrisriesgo/master

Update README.md
Added TemplateContentView

Fixed a bug in template selector that could lead to all instantiated
template selectors sharing a common collection.
Added ViewFor(T item) to TemplateSelector.
Added TemplateContentView a content view with a templateselector.
(Perfect for situations where you want to display different data types
in a single area based on  user selections (ie:  User choosable
widgets.).
Add an Exceptions Folder.
Added InvalidBindableObjectException.
Added NoDataTemplateMatchException.
Added xml doc comments
Removed unused using directive.

Removed unused directives
Moved the Selector function call to the correct location and commented
on why the move was made.
Updated ButtonGroup control and sample code
Modified ButtonGroup Android image
Fixed View/ViewCell bug

Fixed View/ViewCell bug in RepeaterView
Fixed View/ViewCell but in TemplateSelector
Added InvalidVisualObjectException
Added GridLayout utility class

Added new Folder: Behaviors
Added GridLayout class to simplify grids.
Supplies two attached properties:   RowHeights and ColumnWidths.  Each
one accepts a comma separated list of length values and converts them
into RowDefinitions and ColumnDefinitions appropiately.
Added CDATA to code example
Merge pull request #449 from Choran66/master

Added a ContentView with Template Selector support
Merge remote-tracking branch 'upstream/master'