Programmer's calculator,  command line utility.

There was always a loophole when it came to a need to covert between
hexadecimal / decimal / octal / binary.

Especially if it involved an operation like 0x1234 + 0x20 It took a lot of hard
work, and mostly a good pocket calculator.

Main features:

     o Full math parser, parentheses, add, sub, mult, div, exponential
     o Automatic conversion between HEX DEC OCT BIN numbers
     o Mixing different bases in one expression
     o Definable variables
     o Math constants (E PI ...)
     o Built in math functions (sin/cos/sqrt ...)
