Added a concurrent update test for db level cache.
Updated configuration files to enable cache by default
updated cache configuration for non-embedded local configuration to use 3 minute timeout.
updated changelog, simplifed parameter passing.
improved database level cache sizing
Removed streaming of large adjacency result sets since such iterative updating of limits is expensive and has very little benefit. Users should set a limit up front. In the REPL, a CTRL-C type functionality should be available to abort long running queries.
updated changelog.