Merge pull request #67 from ferrix/syncstatic_fix

Fix bug in commit 2e97c5a
Update cumulus/management/commands/syncstatic.py

options.get is not falling back to the default STATIC_CONTAINER when `container` is not passed as an argument. 
Format HEADERS example for easy copy/paste.
Merge pull request #68 from tcdent/patch-1

Fix syncstatic management command option parsing bug
Merge pull request #69 from tcdent/patch-2

Format HEADERS example for easy copy/paste.
Update README.rst
Changed USE_SERVICENET to SERVICENET in docs.
Merge pull request #74 from khalas/master

Fixed documentation - changed USE_SERVICENET to SERVICENET