Added more Icons: 1256

- appbar_calendar_plus
Added more Icons: 1259

- Added appbar_3d_3ds
- Added appbar_3d_collada
- Added appbar_3d_obj
Added more icons: 1260

- Added appbar_3d_x
VS2013 Update 4
renamed TextboxHelper to TextBoxHelper
updated documentation
Rename TextboxHelper.cs to TextBoxHelper.cs
removed Codealike reference
ToggleSwitchButton rewrite
Stop animation on interaction
Merge pull request #1650 from thoemmi/TextBoxHelper-with-uppercase-B

TextBoxHelper with uppercase B
Doubleclick thumb bug
minor DataGrid style issues
remove NotifyPropertyWeaver (not necessary for the simple samples)
Merge pull request #1652 from Dotnetifier/toggleswitching

ToggleSwitchButton rewrite
Update 1.0.0.md
helper classes under helper folder (without namespce change)
Color/Warning fix
create DataGridCellHelper, so the DataGridCell style can get the DataGrid
Merge pull request #1659 from Dotnetifier/toggleswitching

More ToggleSwitch fixes