Bumps version to 0.22a1
phantomjs.py: Calls the _send_loop() future result.

Avoids losing the stack trace.
usage.rst: Adds warning PhantomJS RPC and proxy servers are on localhost.
setup.py: Includes missing dependencies and latest package data.
phantomjs.py: Adds return_code docstring.
phantomjs,proxy: Supports HTTPS by hacking the URL.
processor.py: Hooks up PhantomJS to stats.
changelog: Updates entry about PhantomJS fixes.
processor.py: Supports simple PhantomJS page scrape.
changelog: Updates latest to 0.21.1. usage.rst: Clarify PhantomJS support.
Bumps version to 0.21.1.

Merge branch 'develop'

Conflicts:
	wpull/version.py