Fix CloudMonitorCheck.get so that it properly calls CloudMonitorCheckManager.get instead of the non-existent CloudMonitorCheckManager.get_check.
Don't use djangos slugify, use novaclient.openstack.common.strutils.to_slug
Remove unnecessary shebang lines from files
Merge pull request #494 from sivel/remove-slugify

Remove slugify
Merge pull request #459 from coreypobrien/fix-CloudMonitorCheck-get

Fix CloudMonitorCheck.get
Decouple fakes from test suite.

I've removed the get_png_content function from pyrax.fakes and replaced
its single invocation with os.random(1024).