Corrected spelling error in Readme

s/contends/contents
White space cleanup. Hat tip to @evansolomon.
Merge pull request #6 from pixeljar/master

Corrected spelling error in Readme
Fix bug where staging_domain was always set to a blank string. fixes #11
Use nginx reload to restart nginx
Merge pull request #14 from retlehs/nginx_reload

Use nginx reload to restart nginx
pulled from upstream