Added allow header for video-js fonts.

The flash player in Firefox also needs a Access-Control-Allow-Origin in
order to access the fonts.
Added cql option to meta-copy/update.

So we can limit the metadata updates with complex (or simple) cql
queries.
Fixed solr facetted search for asset_type.
Update readme.md

Fixed a little spelling error: Communitie > community
Fixed style guide in asset unittest.
Asset asset_type and provider_id now updateable.

The rest call /asset/id [POST] now supports update of the fields
asset_type and provider_id (which is a type string now).
Updated empty_assets, metadata also counts now.

Assets were flagged empty when it had no valid mediafiles. This included
all assets that had metadata but no mediafiles. This is changed to not
have dissapearing assets in search queries with hide_empty_assets flag.
Merge branch 'master' into feature/empty_assets
improved aspect ratio handling (SAR/PAR)

@arjenk solved the same issue while migrating content at UvA
again, improved aspect ratio handling (SAR/PAR)

similar to vpx-transcode, @arjenk solved this in another scenario
Fixed bug in oai listrecords.
Enabled image style for other images then still.
Fixed analyse action.
Change git:// to https:// for submodules to fix issues with http/https proxies
Fixed: Drush command metadata explode did not index its data to Solr.
Cleanup fase 1 codestyle.
Fixed problem when using symlink not adding new symlink to its stat cache.
Version 3.5.1-dev build 2098.
Change git:// to https:// for submodules to fix issues with http/https proxies
Added more asset info on the asset info page.

also:
- code cleanup
- added hide empty assets on browse assets page.