3.0111: Fix negative -inf/-nan, windows 1.#INF/1.#IND, STRINGIFY_INFNAN

- Fixed detecting 1.#INF/1.#IND on windows. Also detect now -inf and -nan. GH #28
- Fixed STRINGIFY_INFNAN return string, length off by one. GH #28
win32: add "1.#QNAN", fix invalid C89 declaration (old msvc)
Release 3.0111: Adjust Changelog