21-Mar-2016     Made changes to the built-in function call logic to 
                make the code syntax C++ compatible
27-May-2014     Fixed a bug where a C-string length allocation didn't include
                space for the NULL terminator
23-Feb-2014     Defined EQ_INLINE as "static inline" so it compiles better when
                integrated into multi-file projects
29-Jan-2014     Fixed a bug in validating equations where a number was subtracted from 
                something enclosed in parenthesis, like this:
                           (2 + 3) - 5

