rgbasm and rgblink

• Fix HIGH() and LOW() for constants.
• Added PRINTI to print integers in decimal format.
• Allow JR between sections.
• Allow to continue lines with character \.

rgbgfx

• Add support for colored images.

rgbfix

• Allow more flexibility when fixing the header.

Other

• Document character maps, fix typos in manpages.
• Add .css file to the documentation.

Known bugs:

• The identifier @ is off by one in this release compared to previous releases.