Revert overly restrictive URL matching

Should have tested/looked @ MR #13 closer, broke newegg, parts of amazon
and best buy affiliates.
Remove stray comma.
Add new  match for Amazon, update matching regex.

Add another match for Amazon domains, replace . regexes with escaped
slashes for less confusion.
Update ThinkGeek URL matching.

Made it less pervasive to avoid cart issues.
More restrictive GuitarCenter matching.

Made the GuitarCenter match a narrower scope.
Add trailing slash in audible.

Added a trailing slash i forgot.
Bump version to 0.9.2

Bump version for quick release.