Update install to mention Homebrew Python on OSX

Also fixed a small typo.
Amended, with asciidoc syntax.
Regenerate authors
Merge branch 'larryhynes-patch-1'
Remove 'finding the correct branch' from HACKING.
Remove old comment.
Add some tests for config loading.

This would have prevented the issue in
e87b3fd5689aa20567167fafb19e9da195898349.
Fix sect/opt in config validation error message.

This is a regression introduced in 0c1420112c926bdaea8b2db12606f0901a94ed18.
See #202.
Clean up ConfigManager._from_cp.
Add icon to README.asciidoc.

See #325.
Add a qutebrowser.ico file.

See #322 and #325.
Require BASEDIR in freeze.py.
Add .ico file to freeze.py. Fixes #322.
Fix type annotation for :zoom. Fixes #332.
Preserve arguments when re-splitting with aliases.

Fixes #339.
Add some notes from /u/angelic_sedition
Improve INSTALL documentation
Ensure the docs gets included in freeze.py.

See #346.
Always auto-remove adblock downloads when done.

Fixes #342.
Fix height calculation of download view.