Log Message:
tclap: updated to 1.2.3

Minor release for 1.2 branch (v1.2.3):
- v1.2 is now in maintanance mode, 1.4 is the development version
- Documentation improvements
- Minor obscure bug fixes
- Improvements to test code

Bugfix release for 1.2 branch (v1.2.2):
- Fixed a few typos
- Fixed ZshCompletionOutput
- Fixed brief output with TCLAP_NAMESTRING defined
- Initialize theDelimiter (supress warning) in DocBookOutput
- Fixed an issue with config.h and compiling on systems
  without sstream.h
- Fixed } outside of include guards in ArgTraits.h