Only add --no-trunc for newer docker versions.

For older docker version this flag may not be defined, and also they
don't use long CIDS in the cidfiles.

I'm not 100% sure that 0.10.0 is the correct version where we want to
switch to using --no-trunc, but I think it's correct.
Merge branch 'staging' into gh-1323
Added filter for videos where primary language is set or not, with an annoying workaround for a solr/haystack issue. For issue #1323