Bugfix to address longtime outstanding warn. Also began cleanup JSON job specs (adding commas, JSON parser works without commas but it's non-standard).

add synchronization to NativeTask and error handling in C++ lib to handle thread safety during unloading of resources.

add gcc4.8 'fixes' to get_property, update test classes to trim return value when not using assigned length strings

Add new thread synchronization mechanism and all associated to NativeTask to solve issue with duplication of native tasklibs