If a property is not set for an algorithm and its default value is set
to be an EMPTY_INT/DBL/LONG, do not show the internal representation of
this value to the user in the Workspace History dialog. Instead, show an
empty property.

Add a method to PropertyHistory to test if property is set to an
EMPTY_XXX default value. Use this test in AlgorithmHistoryWindow.

This also gives WorkspaceProperty a temp value if it it doesn't have one.

Refs #8784

Refs #2650. Add abilities to the history so that any previous algorithm can be recreated plus corresponding tests."

Rename Framework code directory to just that. Also delete Main and VS & Eclipse project file. Re #1881.

more doxygen warning hunting

re #185. All algorithm parameters now have direction: Input, Output, or InOut. Output parameters (except workspaces) are not shown in the ExecuteAlgorithm dialog box in QtiPlot.

Moved Alogrithm::fillHistory a little closer to the "path of object-oriented righteousness", as one of my programming teachers would say. Also removed duplicate of methods resulting from Python integration. Re #179.