The issue was that search results from other providers (contacts,
calendar, etc.) were unformatted, like 'event' or 'contact', while the
built-in event types (folder, file, etc.) were being modified by custom
result functions to something like 'Files' or 'Folders'. The fix is to
capitalize and translate all result types by default. Custom formatting
is still allowed (and example documentation has been added) but the
built-in result formatters where now unnecessary and were removed.

use places/folder icon,
move link construction to JS,
only show icon on hover,
use 'searchresult' as css class name,
add filter/unfilter methods,
highlight searched files in current filelist
only filter when correct FileList is present

http://caniuse.com/#search=radius

http://caniuse.com/#feat=css-boxshadow

Fixes: oc-1369

respect coding style

The data supplied is never used in OwnCloud. Removed the call from all the apps, and made the public API function empty.

Create OC_JSON class, for single point of creating json responses.
No real logic change, this just cleans up the code a bit.