BUG: Implement igtl::Strnlen() for platforms that do not have strnlen. See issue #25.
STYLE: Increment the patch number.
COMP: Fix compiler warnings for Mac OS X Mavericks.
Merge pull request #27 from tokjun/25-missing-strnlen

Implement igtl::Strnlen() for platforms that do not have strnlen(). See issue #25.