JIT compiling expressions: done!
Forgot to add JITFunction.cs
Merge branch 'devel' into jit

Conflicts:
	Kerbulator.cs
Tokenizer has a new constructor
Merge branch 'devel' into jit

Conflicts:
	Makefile
Merge branch 'master' into jit
JIT compilation now supports calling build-in functions
Makefile now works on windows
Working on getting JIT function calls working
Calling a function now works, sort of
Starting work in list support in JIT functions
Operators operating on lists done. Working on dot() function
Vector math functions operational
Added support for user functions
Fixed rest of code to use JITFunction instead of Function
Added clear compile-time exceptions, run-time exceptions still to do
Starting work on run-time error messages
abs and len are broken now
Runtime exceptions now working
Only compile functions when necessary