release 4.1
Much improved Commander X16 support in this release.
- got floating point working for cx16, added VERA registers
- made more textio routines available for cx16
- added some more cx16 example programs
- started using 65c02 features for cx16 target
- implemented more missing math code generation
- fix compiler hang and missing type checks in for loop range values
- fix for loop code generation for word loop variables