* do not use V8 variant of AQL functions in early optimization stage when a C++ variant is available
* additionally, simplify AQL function definitions and aliases
* warn when more than 90% of max mappings are in use
* added C++ variant of replication catchup
* added `--log.role` option
* updated CHANGELOG
* removed non-existing scheduler.threads option from config
* removed useless __FILE__, __LINE__ invocations
* updated CHANGELOG
* allow a priority V8 context
* remove TRI_CORE_MEM_ZONE
* try to fix Windows errors & warnings
* cleanup
* removed memory zones altogether
* exclude system collections from collection tests
* working documents rest handler
* fixed cluster tests
* Consolidating database APIs
* clang-format
* Fixing issue with user creation through db._createDatabase
* replaced and refactored api-index and index api
* fixed cluster
* renaming some files
* added user methods
* removed files intended for later
* Fixed CC build
* Fixed method signature
* Fixing shell_server, shell_client tests
Jan
Simon Grätzer
Jan Christoph Uhde
Frank Celler