some changes to NumericUpDown

- make it possible to override ScrollViewer
HorizontalScrollBarVisibility, VerticalScrollBarVisibility properties
- TextBox TemplateBinding to MinHeight
- TextBox TemplateBinding to Foreground
some changes to DataGridNumericUpDownColumn

- bind control to DataCell foreground (only for not editing)
- changes to default and editing style
DataGrid style changes

- MetroDataGridCell, MetroDataGridRow, AzureDataGridCell
Merge pull request #1381 from MahApps/punker76-DataGrid-issues

fix some DataGrid issues