DOC: Remove Image2.cxx reference from Book 2.

The reference from the Image2.cxx example used in the Software Guide
Book 1 refers to a section that is now in Book 2.

Change-Id: I4318297dfaf43bd3d071fe61a42586751d26963f
DOC: Fix Software Guide page overruns in IterativeClosestPoint3.cxx.

Split up the literal code section.

Change-Id: Ic590b5b5642ca77b4f0d152dd27555a5c27004b4
DOC: Remove references to Book 1 sections from Book 2.

These are undefined now that we have separated the books.

Change-Id: I4c801e667b3598a5aaa2dfd0e2a1195193cdef41
DOC: Make BinaryThresholdImageFilter not floating.

In the Software Guide, the code renders overlapped with the figure.

Change-Id: I59bdfcd449360845acbe9b2890f4d41fb6983bac
DOC: Fix Software Guide figure caption for FlipImageFilter.

Change-Id: I088aeb081c5668498b30b84d5fc1c90639133ed5
DOC: Avoid duplicate figure description in ResampleImageFilter2.cxx.

Change-Id: Ic9f4c3a3889c5c83e9a690d0f09c17042e14aa5d
DOC: Remove duplicate figure in LaplacianRecursiveGaussianImageFilter2.cxx.

Change-Id: Icf44d1aec2b9f23c25359ddaabf1d37461e19a44
Merge branch 'software-guide' into release

Change-Id: I0cca22616dc95012c2332bdf1c89c584daef1a95