Refactor

[dshanske]

• Update readme links
• Add filter to allow custom database insert.
• Latitude and longitude properties are now converted into a location property.
• Introduce new function to simplify returning a properly set datetime with timezone
• Media Endpoint now supports a delete action.
• New query unit test revealed bug in new q=source&url= query previously introduced.
• Update media response to now just include published, updated, created, and mime_type for now.