Merge pull request #371 from cdeepakroy/master

Improved the command-line help for ImageMath -W <type> <filename>
ENH: Upgrade to use the same libs as Slicer 4.4
Merge pull request #372 from aylward/Slicer44

ENH: Upgrade to use the same libs as Slicer 4.4
Merge remote-tracking branch 'upstream/master' into RetrieveLocalRidgeInformation
Converted double assignment to single to adhere to the style guidelines