- Fix compilation errors, missing dllexport and warnings on
  Windows and/or MSVC (Daniela Engert, Marcel Raad)

- Fix unintialized fields (Zoey Greer)

- Stop options with implicit value from consuming separate tokens (Michael John Decker)

- Make multitoken limit be max int, not 32K (Hans Hohenfeld)

- Code formatting and documentation fixes (Jurko, Lauri Nurmi)

- Minimal support for no-rtti build (Minmin Gong)

- Don't increment environment pointer past the end (Vladimir Prus)