- Added basic markup for MainWindow.xaml.
- Added buttons to left panel.

- Created ResourceDictionary to contain styles and templates

- Added basic brushes, standard template and style for buttons
- Changed Button and ToggleButton tamplates. VisualStateManager is used now instead of triggers.
- Slightly changed layout of MainWindow.xaml. DockPanel at the top and UniformGrid at the left have been replaced by grids.