Updating ITK v4.8 along release branch
Updating ITK v4.8 along release branch

192495a BUG: Removed an unguarded print statement.
6c3baad BUG: Initialize mutex for 32 bit AtomicInt.
b13509d DOC: Expanded TreeContainer Example
e29bf9a BUG: LBFGSB was printing messages even with debug switched off.
d38900a COMP: Changing the order of HDF5 library components
11c73b6 BUG: Implement UpdateLargestPossibleRegion for
ImageToVTKImageFilter.
5f6353e BUG: Missing ITKIOMINC_EXPORT on __Private()

Change-Id: I901c6249d17ca14d05a477c6275b344621930048

richardbeare/SimpleITK,SimpleITK/SimpleITK,richardbeare/SimpleITK,SimpleITK/SimpleITK,InsightSoftwareConsortium/SimpleITK,kaspermarstal/SimpleElastix,blowekamp/SimpleITK,InsightSoftwareConsortium/SimpleITK,InsightSoftwareConsortium/SimpleITK,kaspermarstal/SimpleElastix,blowekamp/SimpleITK,richardbeare/SimpleITK,SimpleITK/SimpleITK,SimpleITK/SimpleITK,blowekamp/SimpleITK,richardbeare/SimpleITK,kaspermarstal/SimpleElastix,blowekamp/SimpleITK,richardbeare/SimpleITK,kaspermarstal/SimpleElastix,InsightSoftwareConsortium/SimpleITK,SimpleITK/SimpleITK,SimpleITK/SimpleITK,kaspermarstal/SimpleElastix,richardbeare/SimpleITK,InsightSoftwareConsortium/SimpleITK,kaspermarstal/SimpleElastix,richardbeare/SimpleITK,InsightSoftwareConsortium/SimpleITK,richardbeare/SimpleITK,blowekamp/SimpleITK,SimpleITK/SimpleITK,blowekamp/SimpleITK,InsightSoftwareConsortium/SimpleITK,SimpleITK/SimpleITK,kaspermarstal/SimpleElastix,InsightSoftwareConsortium/SimpleITK,blowekamp/SimpleITK,blowekamp/SimpleITK