version 1.12 - bug fixes + new test suite!

(skipped version 1.11)
Finally gave in and wrote a test suite for the core algorithm in lisp.
Worked wonders for flushing out bugs.

* repack logic was flawed: only download repacks for exact matches of
  episodes we already have.

* matching had a few minor bugs in it.

* BTN feed parsing: ignore episodes with crazy descriptions, of which
  there are many. Clean your data, people.  Cripes.

* logging is more concise and goes to stdout in debug/interactive mode