fixed datafile debugger

Conflicts:
	CHANGELOG
fixed docu
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
Added documentation for _create function in graph module code
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel
Beatified Fluent aql graph documentatioN
Beautified Management documentation of graph module
Moved first steps of grpah module into its readme
Added new files of graph module documentation
Removed hardcoded. Examples in Management for graph module
added crypto.hmac function
Added Upgrading to gitbook
Added more in-code documentation for the graph module
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel
Improved ordering and structure of the graph management documentation
Moved Vertex operations to Functions in graph module documentation
Merge branch 'devel' of github.com:triAGENS/ArangoDB into devel
return HMAC as hex
Moved list of all available graphs in the management documentation
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel