DOC: itk::statistics -> itk::Statistics.

Change-Id: I3ea191ae4fa87fb076346f4c481cc4324acc9481
DOC: Remove duplicate text in LaplacianRecursiveGaussian example.

This appears to be a copy/paste error from the
SmoothingRecursiveGaussianImageFilter.

Change-Id: I81dd7ccd6b563495a7521bce722036169d994aa1
DOC: Fix Software Guide page overruns in IterativeClosestPoint{1,2}.cxx.

Split up the literal code section.

Change-Id: I921913032ce143c413ba734c77af8ad5dd6cc4d0
Merge commit 'dfc724c3f31150ff76f11ebdca53a232fb' into release

Change-Id: I7ea69e64d6c51413929408f55b360601281b3486
Merge branch 'release'

Change-Id: I58f527220e8fb6705dae9bb1bba3ba57d3bf77ec