* Add property handler for full spec driver

* added full spectrum driver

* add full spectrum driver to supported list

* fixed charset use

* rename property class and removed leftovers

* changed use of property to renamed class

* renamed remaining instances

* Don't send feed rate as part of a G0 rapid for Grbl, and don't send spaces in transmitted gcode

Fix double grbl identifier line

Flush serial buffer after connecting and sending DTR, but before sending 0x18 reset. Fixes issue with double grbl identifier line.

Fix focus field unit for gcode drivers.

Add license details, remove TSP Optimizer

Unused, and introduced incompatibly licensed libraries.

New dithering algorithms: Halftone and Brightened Halftone

Really fixes #61

These dithering algorithms are more robust against inaccuracies caused by real-life machines and materials.

- Halftone: a 8x8 ordered dithering with a dot-cluster pattern

  Because the pixels cluster together and form dots of varying size, it works better than other algorithms with finer pixel patterns.

- Brightened halftone: Halftone with an applied brightness correction for engraving on Acrylic

  Similar to the "Brighten" dithering profile offered by Epilog

Really fixes #61

Fix broken Smoothieboard serial and IP upload methods.

Implement clone method for LaosEngraveProperty

Fix silly bug in file export method validation

Remove trailing zeros from raster3d generation.

Add more to authors file from browsing git history

This can result in less data to send to the cutter and faster engraving.

Replace use of LinkedList<Byte> with a wrapper around byte[]

This makes generating large raster3d jobs much faster, with less memory
allocation and gc churn.

Add saveJob() implementations

Add explicit upload method selection to gcode driver