Bug fixes:
- Fix issues with system-defined integer widths in binary model files
    (mainly impacted the greedy tagger and parser); please re-download any
    parser model files you may have had before
- Fix bug where parser model directory is not created if a non-standard
    prefix is used (anything other than "parser")

Enhancements:
- Silence inconsistent missing overrides warning on clang >= 3.6