Add API for Articles and Resources

Addition of:
* API endpoint for ```articles``` and ```resources``` models
* Added new requirement for mysqldb (python)
* Changed some imports to reflect the new structure
I believe this import statement can be simplified like so:

`from content.models import Resource, Article`

Django autoloads all the apps so you don't have to include the `dispatch.apps` part of the import statement, just the app name.