Ver 2.0

- ISR optimization
- Fixed Car parked when in sleep and when charging.
- Fixed issue where ODO was wrong when unit set to miles.
- Changed: Motor temp = 0C if < 0C as car_tmotor don't handle negative
temperatures.
- Added reading VIN.
- Changed QC detection, need to see QC for 5 consecutive 1-second ticks.
- Fixed 12V alert issue.
Fixed speed bug for miles configured cars
Optimization of interrupt function
Merge pull request #130 from tbergo/master

Version 2.0
Tesla Roadster: Treat TBattery as signed
ACC: Add a RADIUS parameter, supporting geo-fencing radiuses per acc locations
ACC: Route MSG commands through to ACC (for possible special handling)
ACC: Support charge, stop, and cooldown overrides
Merge branch 'master' of https://github.com/openvehicles/Open-Vehicle-Monitoring-System.git
2.6.5 Firmware
Revision to SOC and idealrange calculations, from Tom Saxtons suggestions
Twizy V3.2.1
    - Statistics: avg speed and accel/decel, trip length (car_trip) and SOC usage
    - New trip efficiency report after driving incl. new stats
    - RT-PWR-Log and RT-PWR-UsageStats records extended by new stats
    - New CFG RAMPL command to set ramp rpm/s limits
    - CFG TSMAP extended by speed coordinates
Merge branch 'master' of https://github.com/openvehicles/Open-Vehicle-Monitoring-System.git
Twizy release 3.2.2
  - Bugfix: Trip report recuperation percentage calculation fixed
UTILS: cr2lf() now also translates '^' to '/' (SIM908 SMS charset workaround)
Twizy version 3.2.3:
    - Added battery max drive/recup power from PDO 424 to RT-PWR-BattPack
    - Added power level shaping info to user guide
    - Motor temperature now also available below zero (signed)
    - SEVCON auto-login on every switch-on (for SDO reads)
    - SDO functions now check component status