Completed first pass of road digitizer tool
Added new tool to makefile and fixed some issues
fixed some references crashes
re-organized road
made changes since snapping does not work for background layers
moving from QgsPoints to plain floats to make basic functions work
working example of more than one pair of segments
comparison of floats more safe with abs
replaced 1e-7 with 1e-4
Added new median function for road digitizer