Fixing the disappearing arguments problem.

[#63122524]
[#619]
x2 for Measure Instances

[finish #63388046]
Fixing up WorkItem paths on de-serialization of Problem. Temporary fix of #767 pre-refactor.

[finishes #63387980]
Some clean-up. (Removing unhelpful log message and commenting on RubyJobBuilder::setIncludeDir, which is more like ::appendIncludeDir.)
Merge pull request #777 from NREL/20140106_ETH_DisappearingArguments_63122524

20140106 eth disappearing arguments 63122524