The reason for this change is related to the diamond inheritance that we
had previously for SplittersWorkspace. VS2012 did not manage to compile
this in combination with the virtual doClone() function with covariant
return types.
Just like IMaskWorkspace, ISplittersWorkspace is now not a Workspace
anymore, and thus the diamond is gone.

Implemented algorithm GenerateEventsFilte, including unit test.
Some related classes are modified accordingly.

And also a custom dialog for it.

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.

* Added progress reporting to binary operations
* Some doxygen fixes

Example improvements in binary operation speed, based on 10k Merlin spectra (old values in brackets).
           Windows     Linux(s1)
Plus       0.9 (4.5)   1.4 (6.8) seconds
Minus      1.0 (4.3)   1.4 (7.9) seconds
Multiply   0.8 (4.0)   1.2 (6.6) seconds
Divide     4.1 (7.9)   1.9 (6.6) seconds

Re #509.

Made properties easier to use in algorithms. Can now get value of a property via getProperty (doesn't work for strings yet, but can still use getPropertyValue for that). This also signals the demise of IProperty. Re #55.

resolve package reference issue