* Generalised base conversions, and added procedures to convert from decimal
  to base-n and back. Current version supports only integers, and bases 2-37.

* Made minor changes to remove some remnants of variable-substitution.
Merge branch 'master' of github.com:mauriciofigueroa/praatMiscScripts
Merge pull request #3 from jjatria/master

Base-n to decimal; decimal to base-n