Included change of existing edge definition in graph-http-module
Fixed JSLint warnings
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel

Conflicts:
	js/server/modules/org/arangodb/foxx.js
	js/server/modules/org/arangodb/foxx/request_context.js
Added functions to list all graphs and all vertex/edge collections of a specific graph to http-api
Added tests for vertex and edge collection lists in http interface. Added docu for _list in general-graph module
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel