Merge topic 'UpdatePythonDownloads'

53c626ee Adding links for Python downloads for version 0.8.0 from SourceForge
Merge topic 'AddedSimpleDerivativeLuaExample'

6152a453 MD5 for SimpleDerivative.lua output image
563aad17 Added SimpleDerivative.lua example
Merge topic 'SIMPLEITK-510_AddUseHistogramsOptionToLabelStatistics'

6c09242b COMP: fix extraneous semi-colons at end of member function definitions
01352604 Adding UseHistograms option to procedure and Execute methods
37840d29 Add initialization to the new parameter member variable.
5f59ad99 ENH: Adding UseHistograms options to LabelStatistics
Merge branch 'master' into next

Change-Id: Ia17071d690ec196794ef94c875819f945b374304