Merge pull request #7 from kcampos/fix-dupe-os-notify

Fix duplicate notify declaration. Fixes #3
Add Scientific Linux support
Merge pull request #9 from kcampos/add-slinux-support

Add Scientific Linux support
Use params for service, user, owner
Add mysql integration
Explicitly declared root:root as the owner of /etc/apt/sources.list.d/datadog.list
Added a define for an HTTP health check
Added desciption of the dependency
Removed metadata.json until I figure out what it needs
"DNT: 1" in the example is causing errors due to a bug in the agent, trying to apply len() to an int
Added dashes before each tag in the list
Added a definition for an apache check
Fixed the usage example
Added a directory check
Fixed a couple of template variables not being declared as globals in http_check
The title is now implied from the resource name
Added a process check
Amend
Bug fixes in the templates
Fixed parameter exact_match