Whitelist metadata attributes in forDB. Fixes #877.
Fallback for sub-module requires. Fixes #789.
Merge pull request #884 from pluma/foxx-models-io

Better Foxx.Model attribute handling (fixes #877 and #878)
Merge pull request #885 from pluma/require-submodules

Added fallback to allow requiring submodules (fixes #789)
splitted datadir
fixed keepNull in cluster
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into mjmh

Conflicts:
	Makefile.am