Make the current search context more evident

Fix: make the "Search in" select larger, currently it can't display
"Strings & Entities" correctly

Enhancements (issue #107):
* Add a label under the search field explaining where the search will
be performed
* Label changes according to the select
Merge pull request #108 from flodolo/issue107

Make the current search context more evident
experiment, showrepos as a json output for syndication
use locale code as key
Merge branch 'experiment' of github.com:mozfr/transvision into experiment