toggle dropdown on click in navigate bar
prevent browsers from displaying a broken img
added user validation API at POST `/_api/user/<username>`
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
change password added
fixed memleak
jslint
modified scss
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
jslint fixes
fixed uninitialised variable access
userManagement switched from table to tiles
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
prevent deleting active user
hide search options
the lib does not work properly with firefox, so the part of the lib is deactivated.
fixed css for node list
missing ; added
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into sharding

Conflicts:
	CHANGELOG
	arangod/Ahuacatl/ahuacatl-access-optimiser.c
	arangod/CapConstraint/cap-constraint.c
	js/apps/system/aardvark/frontend/scss/_tiles.scss
	js/apps/system/aardvark/frontend/scss/generated.css
	js/apps/system/aardvark/frontend/scss/style.scss
	js/common/modules/org/arangodb/users-common.js