Arduino Pedelec Controller 1.30

• Introducing support for KM5s and rewrote J-LCD code
• Featuring an common API for King-Meter displays
• Added display_debug() and SERIAL_MODE_DISPLAYDEBUG/BLUETOOTH_MODE_DISPLAYDEBUG
• disable motor output at startup - there was a 100ms spike during setup
  routine at motor output
• slowly ramp PID integral part down to 0 when not pedaling instead of
  setting power setpoint to -60W. This could lead to malfunctions, e.g. if
  the current offset is configured wrong.
• added option to reset integral part instead of ramping down