v0.5.0

Currently using a branch in my fork of kooky which has some fixes and performance improvements. I've created browserutils/kooky#42 and browserutils/kooky#43 to start trying to contribute them upstream.

Changes:

• Make the cookie database reading code for Chrome and Firefox less dependent on the current browser version and the browser version when cookies were created. This allows cookies to successfully read cookie databases that it previously failed to read.
• There are now two logging verbosity levels. Specifying -v once enables basic logging, specifying it twice gives per-cookie logging.
• Cookies are read in parallel.
• Encrypted Chrome cookies that we don't return aren't decrypted.
• When multiple browsers are used, the cookies from all browsers are combined. Previous we iterated through browsers stopping at the first browser that had a relevant cookie.