ENH: Use Tiff version dependent field type enable LSM

LSMImageIO was naively dependent on the ITK tiff library, when only
the return type of TIFFFieldWithTag changed between tiff library
versions. All dependencies of LSM and SYSTEM_TIFF have been removed.

Change-Id: Ibf4fc743e49de7d514b1410df28be1fc3e28d4d5
DOC: Fix instances of class documentation outside itk namespace

Change-Id: Ib6cee1b4c6516f7d09f8bab1167ce740e86f664e
ENH: Bump CMakeLists.txt version to 4.5.0.

Change-Id: I3989eafe5ad2ec94ee8e02b732992d249a21abb4
Merge topic '4.4VersionBump'

6d40aba ENH: Bump CMakeLists.txt version to 4.5.0.
Merge topic 'doc_namespace'

f92efa0 DOC: Fix instances of class documentation outside itk namespace
Merge topic 'FixLSMSystemTIFF'

e189a5c ENH: Use Tiff version dependent field type enable LSM
ENH: Add Remote Module for r/w of MGH files

The MGH file format is prevelant in many
neuroimaging environments and it would be
convenient if ITK were able to do at least
basic manipulations of these image file
formats.

This patch is intended to develop a solution
including MGHIO as a Remote Module.

The Remote Module has more extensive testing than the original.

Change-Id: I8d3e3d62062c2236e8aca5760551348c5eaf7494
Merge topic 'AddMGHImageIO'

5c7f10b ENH: Add Remote Module for r/w of MGH files