1000 chars to avoid the exception thrown by libomv at 1100 chars.
Change string->int conversion so it copes with non-numeric chars
after the number and no longer uses a float to parse the value.
which is a thin wrapper around a IWorkItemResult from the SmartThreadPool.
However, it is very easy to reimplement on top of basic threading and therefore
makes the IScriptInstance class independent of the specific threading
implementation.
engines that want to use the XEngine's instance handling and state
persistence can do so. IScriptInstance is optional, but it does
require the SmartThreadPool if it is used.
