Twizy: Major update: SEVCON controller configuration
  !HIGHLY EXPERIMENTAL FEATURE!
  read documentation (userguide) first!

ATT: due to ROM limitations, this release cannot be
  combined with other vehicles and/or DIAG mode!
Twizy: controller configuration: switching back to operational state
  should be more reliable / robust now, plus some minor fixes in the docs
- CAN simulator preprocessor flag renamed to OVMS_CANSIM
- Read/write SDO: retries + watchdog clearing
- Power map generator for SPEED / TORQUE
- TORQUE command extended by max motor power parameter
- Stack usage optimizations
- Interrupt optimization (#pragma tmpdata => needed for all ISR - TODO!)
- Minor fixes
- Documentation update
- Power map calculation spreadsheet
- List of used SDOs
Twizy: SEVCON configuration
 - Code cleanup
 - Added preprocessor flag OVMS_TWIZY_CFG
 - Documentation fixes
 - New: "Twizy Limits" spreadsheet
 - SDO list extended by macro command reference
Merge branch 'master' of https://github.com/markwj/Open-Vehicle-Monitoring-System.git

Conflicts:
	vehicle/OVMS.X/diag.c
	vehicle/OVMS.X/vehicle.c
	vehicle/OVMS.X/vehicle_twizy.c
Twizy V3.0.2: CFG TSMAP allows 0..100 for levels 2..4

  ATT: Twizy build will need exclusion of acc and logging module
  due to ROM space limitation

Framework:

- new preprocessor flag for vehicle poller code:  OVMS_POLLER
  (will need to be added to vehicle build configs!)

- integration of ISR optimization for all vehicles