First release as independent package (independent from main LLSpy package)

Added:

• Hex pattern generator added
• Ronchi-ruling pattern generator added
• Batch SLM pattern generation
• Docs available at http://llspy.readthedocs.io/en/latest/slm.html
• Option to show dithered lattice
• User-adjustable LUTs for intensity (mask/sample) images

Changed:

• SLM pattern generator moved into seperate package: slmgen
• Better multi-threading when batch-writing SLM patterns

Fixed:

• SLM pattern generator now writes 1-bit file usable on SLM, instead of 8-bit png