v0.20.0

• Merge #28 Added increment change for --set in command line argument from @ujjukumar
• Add ability to look up method name via get_methods
• Rework exceptions (see d5f1bdd)
  • New exceptions added. Should all be backwards compatible
• Refactor:
  • windows.get_display_info - removed massive generic try/except blocks
  • helpers.EDID.parse - more helpful exceptions
  • filter_monitors - better readability
• More consistent use of "display", "screen" and "monitor" terminology (see 46bfac2)