0.1.1

Changed

• No longer filters gcode if not printing
• Retraction commands are not rewritten unless inside an excluded area.
  Resolves #3

Fixed

• Error when a non-Gcode command was received.
  Resolves #2
• Generated an incorrect move when exiting an excluded area
• Extruder feedrate was being set for subsequent moves that didn't provide their own feedrate
• Commands that only set feed rate were being dropped
  Resolves #1