Added JSON.stringify and eval()
Nicer JSON indenting
Fixed function output in JSON
Added evaluateComplex
Fixed some reentrancy issues with evaluate/execute
symbol_base removed and replaced with 'scopes' stack
Added reference counting a proper tree structure
(Allowing pass by reference)
Allowed JSON output to output IDs, not strings
Added get/set for array indices
Changed Callbacks to include user data pointer
Added some support for objects
Added more Java-esque builtin functions
root variable now doesn't change (as you'd expect)
a few built-in functions
The lexer can now work on a substring, which means no more string copies for loops/functions