BUG: Use correct types for TIFF Tags and buff math

Use fixed width integer types for fields used with TIFF
tags. Specifically, m_ResolutionUnits was the wrong size causing
failure on big endian systems.

This patch also casts buffer math to size_t to address JIRA issue
2822. Enabling new larger IO TIFF test.

Change-Id: Ie33ae1e5057dc4be6996bffd8ff8e344f5527670
BUG: Use local var for TIFF va_list parameter

This patch should address the itkLSMImageIOTest failures of the
dashboard.

Change-Id: I7f5225d9d79db079f669f0186118da7e538e5f75
BUG: Use correct bytes for BigEndian magic number

Change-Id: If45c760b939afae7c14d1d71966e8620aede311d
Merge topic 'FixLSMReadInformationSegfault'

93a8784 BUG: Use local var for TIFF va_list parameter
Merge topic 'FixBigEndianFreeSurferBinaryMesh'

96d341c BUG: Use correct bytes for BigEndian magic number
Merge topic 'FixTIFFIOTypes'

98ef780 BUG: Use correct types for TIFF Tags and buff math