renamed collection `_graphs` to `arangodb_graphs`
refactoring of multiple databases, intermediate commit
Merge branch 'devel' of https://github.com/triAGENS/ArangoDB into devel
dropping databases, unfinished
refactored database options
use database defaults properly
fixed batch handler
small cleanup
simplified error messages
creating/dropping
updated documentation
updated docs
runtime configuration of endpoints, unfinished
async dropping of databases
prevent usage of db._useDatabase() in HTTP requests
runtime addition and removal of endpoints
reverted name change for _graphs collection
updated CHANGELOG
_graphs renaming rollback
updated TODOs