* 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
* Added checks everywhere for CachedValue::construct.
* Enforce 16MiB limit on keys and 4GiB limit on values.
* Protected members behind function calls in anticipation of format change.
* Shrunk CachedValue struct.
* Fixed alignment of CachedValues.
* Fixed improper comparison.
Wilfried Goesgens
Frank Celler
Jan
Dan Larkin
Dan Larkin