add GcodeParser
WrapDouble: fix it
AvrSerial: make recvForceEvent() always queue an event, even if receive buffer is empty
Steppers: add parameter to invert direction
GcodeParser: automatically make all command/parameter names lower case
IntDivide: allow ResSatBits to be needlessly large
AxisSplitter: increase bit counts for time and step types
add Blinker
Initial version of the main printer code. The foundation fo the G-code/serial protocol implementation
is in place. Homing works.