Speed and scoring improvements

[djdembeck]

Enhancements:

• Reduce limits, greatly increasing speed
• Remove duplicate parse function, reducing time to search.
• Check author name validity (don't use author name in search if it's bad).
• Reduce score by 2 if language isn't library language:
  • Only reducing by 2 will help picking a book from match dialog, without compromising auto-match score threshold of 98, if you do add a foreign language book.

Fixes:

• Series not found/added to album sort.
• Fix series title regex.

Documentation:

• Add changelog

Closes #19