Refs #1282: Refactoring meedan_oembed.

New modules are:
- meedan_oembed
- meedan_oembed_facebook
- meedan_oembed_twitter
- checkdesk_oembed_almasryalyoum
Merge branch 'feature/oembed-refactor' into develop

Conflicts:
	drupal/sites/all/modules/meedan/meedan_oembed/meedan_oembed.module