Add dev requirements install line
Add missing fields from user mapping case
Merge pull request #3663 from dimagi/readme

Add dev requirements install line
Merge pull request #3664 from dimagi/owner-mapping-case-fields

Add missing fields from user mapping case
Merge pull request #3652 from dimagi/hqstyle-merge

Subtree Merge of submodules/hqstyle-src into corehq/apps/style
Reference specific elasticsearch version in README
Update README.md
Add support for audio multimedia format
Merge remote-tracking branch 'origin/master' into vellum-requirejs

Conflicts:
	corehq/apps/hqwebapp/templates/hqwebapp/base.html
Merge remote-tracking branch 'origin/multimedia-case-properties+owner_name' into autostaging
Merge branch 'multimedia-case-properties' into autostaging
Merge remote-tracking branch 'origin/cache-locations' into autostaging
Merge remote-tracking branch 'origin/hq-dropdown' into autostaging
Merge remote-tracking branch 'origin/refactor-domain-copy2' into autostaging
Merge branch 'hqstyle-merge+vellum-requirejs' into autostaging
Merge branch 'vellum-requirejs' into autostaging
Merge remote-tracking branch 'origin/dynamic-links' into autostaging
Merge remote-tracking branch 'origin/offline-install-multimedia' into autostaging
Merge remote-tracking branch 'origin/logos' into autostaging
Merge remote-tracking branch 'origin/109909-case-performance' into autostaging