opengraph implemented to detail-template
opengraph support in channel template
translation and opengraph in collection template
detail view has complete opengraph
Merge branch 'dev' into opengraph

Conflicts:
	dependencies.txt
	lambdaproject/settings/base.py
	templates/videos/collection.html
added LOGO_URL, OG_LANG_CODE and SITE_NAME for OG
LOGO_URL depence on STATIC_URL
language tag in OpenGraph set in settings
cleaned opengraph with blocks
Revert "LOGO_URL depence on STATIC_URL"

This reverts commit 8207fe782526cc167759e72e205f66abae9a70f6.
Revert "cleaned opengraph with blocks"

This reverts commit cfc024fab4600b0b23febeb6167d5a0a2dc1ccee.
missing quotes, OpenGraph for index page
add 'settings.', OG_LANGUAGE_CODE for OpenGraph
alternative text if there's no description
OpenGraph code more readable, implemention of page
not insert open graph twice
remove newlines in description
Merge branch 'opengraph' into dev