Refs #3157 Sort our System.h. It was becoming a dumping ground. It should only be touched when absolutely necessary as it affects every file in Mantid. Also combined this with Refs #2345 to sort out DLLExport/DLLImport usage. It's done for Kernel, Geometry and API but stuff in the plugins could do with updating as well.

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

Copyright updated to read
Copyright © 2007-10 ISIS Rutherford Appleton Laboratory & NScD Oak Ridge National Laboratory

Clear some doxygen warnings

Added support for automatic background estimation to the Mantidplot fitting tool. The tool was modified to improve its manageability. Now the functions are accessed not directly by via handlers which help the bookkeeping. re #1184

Allow empty value in ListValidator if it's on the list of allowed values plus a bit of tidying up in the validators.
Re #501.

There are changes to WorkspacePropertys that affect PropertyManager.  In all cases Property.setValue() now returns a string containing any validation errors.  This is a change to the WorkspacePropertys that sometimes ignored errors.  There are descriptions for some propertys in MantidPlot available as a tooltip re #593 and re #410 

Mantid Plot now gives explanations for rejecting parameters!  Let me know if any messages could be more helpful. re #409

Added file validator for properties. Also added a method for getting the type of the validator as a string - could not see an alternative way of doing this. Refs #154

Added validators for properties

Will require compilation as a shared library - macro added to add the required symbols ( __declspec(dllexport) ) to all class declarations for Windows.
Closes #32.