removing edges: recursive remove, when edge is used as vertex
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel

Conflicts:
	js/common/tests/shell-general-graph.js
jslint
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
remove edge will remove other edges used as from or to recursively