Cat Version 0.11.1 - nearly a dozen bug fixes

[Christopher Diggins]

Well it's been a crazy day, I found nearly a dozen bugs to fix.

Here is a quick list of what was fixed:
- fixed negative literals bug ( -1 or -1.0 didn't work correctly previously )
- fixed floating point arithmetic problems
- fixed generators (n, naturals, evens, odds, gen, range_gen)
- fixed list comprehensions (lc command)
- fixed function overloading resolution algorithm
- floating points show up on the stack now clearly

Some additions to the code:
- added count_while
- source code folder shortcut in installer
- installer automatically loads tests (you can try "run_tests" to make
sure everything works fine)
- I added several more tests.
- current release is in benchmark mode.

Sorry to whoever downloaded 0.11.0, but you'll be much happier with
this version.

Christopher