Add our README as separate file
Basic operation of Printrboard with normal kinematics and inverted endstops
Printrboard with normal kinematics and non-inverted endstops
Enable CoreXY
Update author/config metadata
Set dimension, speed & acceleration limits according to Chris's changes

See lines 330...336 and 359...361 of c509d932986457b1d53ad19bdcdd0f59fe11b946
Add M550 code to spit out some info, including compilation date
Documented Auto Bed Leveling

Added a read me file for Auto Bed Leveling for the Solidoodle Printer
Metadata cleanup
Reduce Y and Z sizes to current mechanical specs
Configure Auto Bed Leveling
Flip Z direction since motor is now on top
Updated ABL Read Me

1. Included line breaks at 80 chars
2. Removed Solidoodle specific references
3. Added a few more parameters — Safe Homing and Accurate Bed Leveling
Updated Configuration.h file for Missionbot parameters

288 — Needed to invert the direction of the Wades extruder

314 — Printer is able to use Auto Bed Leveling (ABL). This also allowed
Z Safe Homing to be used since the printer must home to ABL location.

323-326 — Defined the points for the auto bed leveling.

329-331 — This is the relative position of the ABL probe with respect
to the Hot End.

353 — Z Safe Homing is required since the ABL probe is also being used
for Z Home

362-363 — When the G28 (Home) command is used, the carriage will move
to this X/Y coordinate before homing Z.

397 - Adjusted steps for Z axis motor and Wades Extruder such that 1
unit = 1mm. Current values accurate to 5%.