Metalworks + RAM Refactoring

• New pneumatics configuration to work with Metalworks E-Regulators
• Bug-fixes to decrease RAM usage causing uncommanded motion
• FreeRAM check to error when free RAM is low
• Updates to build script to improve compatibility with custom wire library

I2C timeout added

Add I2C timeout and error reporting
M272 for ball-bar configuration storing
M248 to disable cartridge check

Release 4-8-2016

Features

• Updated bed coordinates, which had effects on alignment scripts. The coordinates now range from {0,0} to {150,150}, with {75,75} being the center of the
• Changed print pauses when reaching an error state to cancels. This was intended behavior from the start, and now has octoprint support
• Increases cap on motor currents from 60 to 75 as default.
• Added M247 Mcode to activate UV light
• Added M249 Mcode to disable heated bed detection check, allowing printing without a heated bed signal for testing.
• Added M246 Mcode to allow diagnostic information for cartridges to be displayed.
• Added M850 Mcode to display Marlin Firmware version

Bugfix

• Refactored heated bed detection away from keyed signal, to depend on a reported temperature to compensate for the circuit.

Test release

V1.1

Merge pull request #98 from Voxel8/dt/enhancement-raise_max_fan_duty_…