misc reordering for speed
remove un-needed check
Use goto (eep) rather than recursion to handle comments/whitespace
Swapped to jumptable to lexer (should be a bit faster)
            Added the 'E' class, with getAnalogVRef and getTemperature (fix #60)
            Deprecated Math.clip (not in spec) and introduced E.clip
            Fixed bug in common.py that meant that ifndefs in JSON were sometimes not obeyed (better mem usage on small chips)
update example code for deprecated Math.clip