BugFix: editing device files would not cause a rebuild
- removed include of generic-isr.S - it didn't do anything
- removed isr label, better to use ISREND forth label
- BugFix: bad interupt vector at 0x08 - should be a jmp instruction not rcall
- removed commented out code - not going to be used
- minor code reduction and speedup in cscan
- parameter fix for isr in comment
- typo fix in comment
- added timer.fs which defines words for avr timer
- note in comment that auto conversion is on