Still settling design

- Added DotNetHack.GUI
- Removed all old graphical GUI junk, replacing it with a text base gui
lib under construction.
Continued work on text gui, still structural
2nd pass on widget system
Confirmed first two working TextGUI widgets
Added keyboard event loop and event hdlrs

- All widgets now get an id on creation.
- Keyboard input is done on it's own worker thread.
Added "invalidation" routine for console buffer.

- Added GUIProgressBarEventArgs and ProgressChanged event
- Added Window_KeyboardEvent for all "Window" widgets.
Added button widget

also working toward tab-index
added SetCursorPosition by point
addded SetCursorPosition by IHasLocation
MainWidget renamed MainWindow
Added new widget called "TextBox"
All widgets now have "Selectable" property
Added Show method for TextBox
Adding selectable textbox
backspace and reg input is invalidated.
Working through UI event sync and new widgets
Added WidgetSelectedEvent
Init no longer clears
Adding selection widget event
Finalized widget selection model
Added a new panel widget
Update & Add Window, MenuBar, ColorScheme