This makes the naming consistent with the other cbm-like targets (c64, pet, c128). Only the x16 specific ones remain in the cx16 namespace, such as cx16.KEYHDL
Probably the most impactful is the move of cx16.CINV to cbm.CINV
Unfortunately a few routines (minf, maxf, clampf) remain unchanged, because removing the 'f' would make them clash with a builtin function.
floats.rndf -> floats.rnd
floats.parse_f -> floats.parse
floats.rndseedf -> floats.rndseed
floats.print_f -> floats.print
floats.str_f -> floats.tostr
labels with p8l_ . All this to avoid symbol clashes in the generated assembly code.
Everything got its own distinguishing prefix so we're done with it once and for all and have only 1 breaking change moment.
