Add 4DSystems SGC Display Protocol support
Major: add new features and fix bugs
Improvement: restore display settings when returning from shutdown
Add: Character and String commands
Improve: memory usage
Improve: variable ACK timeout
Improve: State machine now restores settings when powering up from shutdown
Improve: no more flickering effects when powering up from shutdown
Add: Sleep mode support
Add: full command set
Add: Support for "infinite" Ack timeout
Improve: needs less memory
Version with tested commands, Release Candidate 1
Add: Autosleep in Shutdown
Add: Pinning for generic_teensy, netio and netio_addon
Fix: some minor bugs
Tested commands
--> Release Candidate 2
Change: GPL v3
Add: Help text in menuconfig
undo unvolontary changes to i2c
Improve: Help text
pin definition moved to add-hardware
add: sgc_ecmd.h
re-done: format with indent.sh
corrected ECMD meta descriptions
Merge remote-tracking branch 'upstream/master'

Conflicts:
	doc/Configure.help
resolved some warnings after sync (double define)
made #defines unique
updated help file
Merge pull request #234 from hundertvolt/master

Add Support for 4Dsystems SGC