Added optional setting to update facet counts based on filtering choices when using Haystack (HAYSTACK_FACET_COUNTS)
Renamed optional setting to turn off security permission pre-filtering (SKIP_PERMS_FILTER)
Simplified/fixed Haystack bbox filtering
Fixed haystack indexing of keyword values
Merge remote-tracking branch 'origin/master' into haystack4
Merge pull request #1571 from mbertrand/haystack4

Additional haystack options/fixes
remove the user api as unneeded and some fixes
some api docs and small security update
update the permissions widget screenshot and some api doc
Fixes issue found in Ubuntu 14.04 with request.body

Debugging information can be found at:
https://gist.github.com/ingenieroariel/74c5d4b3875799d50b3d

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