Proposal: New set of skinnable controls

[BootBlock]

As all Metro controls are going to be removed (see #3) and the current set of controls are somewhat rigid in their visual flexibility, a new set of controls that are geared towards high functionality and skinning capability may be warranted. Some Metro controls, such as MetroComboBox, have a lot of functionality that isn't present within their "standard Windows" counterparts, such as ComboBoxEx.

This issue will be gradually filled-out with more information.

[BootBlock]

For controls that don't require skinning (or will be added at a later date), a very lightweight version of them will be created to directly support the ImageRef property to provide live designer support for SVG images using the Iconography feature in Hiroix.Windows.Forms.

~These are generally to be used with SVGs.~ These controls fully support using both Image and ImageRef; the appropriate property will be serialised correctly, with ImageRef having a higher priority than Image (and, thus, overwriting it).

• [x] ButtonEx
• [x] CheckBoxEx
• [x] LabelEx
• [x] LinkLabelEx
• [x] PictureBoxEx
• [x] RadioButtonEx
• [x] ToolStripButtonEx
• [x] ToolStripLabelEx
• [x] ToolStripMenuItemEx
• [x] ToolStripSplitButtonEx
• [x] ToolStripStatusLabelEx