Added GINPUT Dial support and a driver that uses GADC to read the dial.
Added support for Dial inputs to the GWIN slider.
Updated the slider demo for Dial Inputs.
Simplified the assigning of inputs to GWIN "widgets" button and slider.
Updated the demo's to match the new input to button assignment.
GINPUT when being exclusively polled by the application, did not allow
pre-emption of the main thread and therefore some platforms (Win32) the
mouse/toggle stopped working.
Add GDISP font routines to Open and Close a font by name.
Allows wildcard searching for fonts.
Old global font variables are now only optionally included (soon to be
deprecated).
More demo fixing
Create global include file called gfx.h which knows about sub-system
dependancies.
Deprecate Touchscreen (GINPUT touch is now working properly)
Merge Graph into GWIN
Change directory structure to reflect sub-system structure
Many small bugs fixed
Split Nokia6610 gdisp driver into GE8 and GE12 controller versions
Fixed broken demos.
GFX sub-systems are now clearly defined and new ones should be much
easier to add.
Improvements to error detection and displaying that to the user during a
calibration.
Also introduced a hack to allow initialisation of a touch device without
an automatic calibration for when the user application wants to do
something with the raw readings first.
