* arangoimport was neither reporting nor stopping on communications errors. Add reporting of impacted lines for CSV imports.
* correct warning from Windows build about size_t to int conversion
* basic histogram thread using non-arangod threading ... soon to change.
* Add --latency flag. start histogram thread if set.
* convert quick_hist to use arangodb thread and condition objects
* move histogram object to be within ImportStatistics structure.
* update the thread shutdown to 1. work and 2. post last data
* add text that values are in microseconds to command line help.
* CHANGELOG note for new import latency option
* quick_hist.h rename to QuickHistogram.h
* update include file name to QuickHistogram.h
* update variable names to match coding standard
* a couple more code standard changes. try/catch around push_back
* 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
Matthew Von-Maszewski
Jan Christoph Uhde
Frank Celler
Wilfried Goesgens
Jan
Simon Grätzer
jsteemann