Moving forward on ITK release branch towards 4.4.1

Change-Id: I924d86e097ebcad1ce5374860c9d549649041fe9
BUG: Use printable type for prints chars

Added helper method to convert char type to integers before
print. This prevents printing of non-printable charaters.

Change-Id: Iea67f87805a81c6a7546236b326f85ea8d3f39dd
ENH: Updating to ITK v4.4.1 release tag

Change-Id: Id567c91c19321c86a43f604a55d6e7d86f1a315a
Merge topic 'SIMPLEITK-400_UpgradeTowardsITK_4.4.1'

dc39f53 ENH: Updating to ITK v4.4.1 release tag
0c4e6ac Moving forward on ITK release branch towards 4.4.1
Merge topic 'SIMPLEITK-210_UsePrintableTypesInToString'

b424825 BUG: Use printable type for prints chars