New Humble Bundle website layout

Humble Bundle updated their website so the downloader stopped working. Hopefully this fixes it.

Simultaneous downloads

Now download up to 8 files simultaneously

Toggle between page order and alphabetical order

v1.2.0

Add toggle between page order and alphabetical order

Select particular file types

v1.1.0

Bump version to 1.1.0 in manifest.json

First full version

v1.0

Fix wording for side panel behavior in README