Added a few more auto-generated files to the gitignore file.
Cleaned code up and stuff.
Cleaned up the interpreter code.

  - got rid of `second', replaced with explicit lambdas
  - got rid of join, which was used for slighly trick point-free code
  - cleaned up import statements: all functions are now imported explicitly
Added the LICENSE file for the 3-clause BSD license.
Set up cabal for the project.
Cleaned up imports in Main.hs.
Updated my example files to match my slides.

  - got rid of old demo files
  - added files about people and fruits
  - added things about numbers
Fixed parsing to work properly with multiple comments in a row.