Revert "Add ack-like --type-set and --type-add options (see eliben/pss issue 4: https://github.com/eliben/pss/issues/4)."

This reverts commit 6fee31bcc6af5f358b07f433e8219e3252f1a64d.
Revert "Do all filename matching via regex patterns."

This reverts commit 485035f95703f669cd9aaf78c2fd6d2ad7a89bee.
Fix colorama on Windows 64-bit.
Make TYPE_MAP values (TypeSpecs) support both extensions and patterns.
Added --type-add and --type-set back in (GitHub issue 4).