Merge pull request #21 from Tectu/master

Merge Tectu Changes
Change GDISP poly fns to support translation

Change GDISP poly fns to support translation - required for adding poly
functions to GWIN
GWIN Graph - use GDISP point definition
GWIN doc update and poly functions

Add poly functions to GWIN
Move doxygen documentation to header file
Merge pull request #43 from inmarket/master

GDISP, GWIN updates
STMPE811 - not tested yet
STMPE811: reading registers over I2C

- Reading works.
- Some other cleanups.

Driver is not usable yet.
Merge pull request #44 from resset/master

STMPE811: I2C reading routine
SSD1289 SSD2119: fixed warning messages

Few type castings in order to suppress warnings (-Wsign-compare):
"comparison between signed and unsigned integer expressions"
"signed and unsigned type in conditional expression"
Merge pull request #45 from resset/master

SSD1289 SSD2119: fixed warning messages
STMPE811: working reading, writing and interrupt

- Slightly changed rading and writing routines.
- Added delay after reset of STMPE811 in initialization code.
- STMPE811 "interrupt service routine"
- Comments, formatting etc.
- Another commit with unfinished driver.
Merge pull request #48 from resset/master

STMPE811: working reading, writing and interrupt
STMPE811: attempt to use FIFO

Very early version of using FIFO threshold interrupt.
Merge pull request #49 from resset/master

STMPE811: attempt to use FIFO
STMPE811 - initial
board file fix
STMPE811 getpin_pressed() -> getpin_irq()
STMPE811 cleanup & readme
STMPE811 tweaks
GPIO interface-related fixes
Adding acquire_bus() and release_bus()
so that orientation setting commands are
not ignored.