Revert "Moved main.cc to code folder"

This reverts commit f31bd4c6ff3439b160e1a05293d1bba040130731.

The changes in this commit can be found in the branch liam.
Revert "Added main.cc, began implementing command-line options"

This reverts commit c66a34f43e286ea9c9e092155ef7a54eb97498ad.

The changes in this commit can be found in the branch liam.