Slow trailing steps fix. Added more defaults.

- Fixed an issue (hopefully) with slow trailing steps after a
triangular velocity profile move. Sets the trapezoid tick cycle counter
to the correct value for an accurate reproduction of the deceleration
curve. Keeps it from arriving too early to the target position, which
causes the slow trailing steps.

- Added Zen Toolworks 7x7 to default settings.

- Updated readme with new edge build.

.gitignore

@@ -1,3 +1,4 @@
+*.hex
 *.o
 *.elf
 *.DS_Store