Parse url params in one place
Move meta_users call to a separate method
Abstract away parsing of URL parameters in emwf
Make CommTrack user default not index-dependant
Make [All Data] option not a user type
ESQuery changes - fix default size, misc additions
Replace es_query with ESQuery (fixes WebUser bug)
Undo excess refactor
Bring tests into line with API changes
minor bugfix
Merge remote-tracking branch 'origin/master' into emwf-refactor

Conflicts:
	corehq/apps/es/es_query.py
Merge pull request #3950 from dimagi/emwf-refactor

Refactor ExpandedMobileWorkerFilter, adding WebUser data to Case List report