Wrote a basic implementation of ccall

Its done in a bit of  a clunky way(I use a bunch of nested if/elses to
get the type of the function) but it does work which is really
cool. I'll probly need to do a bit more work, either with macros or a
script to get more arguments(I can only use 3 at the moment) I also
don't think I can do pointer stuff yet, but I'm working on that via cffi
Merge branch 'master' of github.com:hitchiker42/SciLisp