furious

Results 2 issues of furious

I've been doing it with custom functions but wanted to make another contribution to Asar. This PR adds a new builtin function called "rgb555" (sugestion), that you can easily convert...

Minor changes to add support for 16bit values made of two chars, eg.: `lda.w #'AS' : sta $00 : lda.w #'AR' : sta $02`