Add crossfade
Remove code changes.  Replace with test/doc fix for cross_fade
Merge remote-tracking branch 'upstream/master' into crossfade

Conflicts:
	unittest/test_core.py
Merge pull request #215 from dajobe/crossfade

Document cross_fade property and add test for it
Add Release notes for 0.9
bump version to 0.9
Fix links in release notes for 0.9
Add release notes for next version
Merge remote-tracking branch 'upstream/master' into get-queue-counts
Move doc line down to properties section
Rename to property queue_size