version 8.1

• API change: moved all integer trig builtin functions (sin8u, cos8u etc) to regular subroutines in the math module
• API change: moved all floating piont builtin functions to regular subroutines in the floats module
• API change: sum() builtin function was removed altogether
• API change: max() min() and abs() now always return uword type.
• API change: abs() supports only integer arguments now, use floats.fabs() for floating point.
• compiler now correctly accepts string multiplication "xxxx" * expr where expr is not just a number literal (but still must be constant)
• compiler now automatically converts multi compare expression (if x==1 or x==2 or x==3..) into a more efficient containment check (used to only give a warning)
• compiler now gives a warning in many cases about shadowing symbols (re-definitions)
• compiler now automatically inlines some more trivial non-assembly subroutines
• added %option merge to merge module content with existing
• improve checks for invalid pipe expressions
• improve error message for invalid args to min() and max()
• fixed superfluous printing of WARN and ERROR
• optimized cx16.setcc() and setcc2() library routines
• finished the 'virtual' compiler target codegen and the 'emulator'
• several other minor bugfixes and improvements