Bumps version to 0.33a1.
badapp.py: Adds HEAD request handler for Py 3.4.
document.py: Uses HTML hack only for HTML parsers.
connection.py: Checks for Gzip using new util.GzipDecompressor.

Adds util.GzipDecompressor().
Closes chfoo/wpull#115.
Bumps version & changelog to 0.32.1
Merge branch 'release/v0.32.1'

Conflicts:
	wpull/version.py