This adds copyright/license notification blocks CMake's find-modules.
Many of the modules had no notices at all. Some had notices referring
to the BSD license already. This commit normalizes existing notices and
adds missing notices.
- rename some entries (COMPILE -> COMPILER, and the converters -> _CONVERTER)
- make sure that Window system are given a chance to find Latex and the converters if MikTex and GhostScript are installed (but not in the PATH)
Todd Gamblin
Brad King
Ken Martin
Bill Hoffman
Andy Cedilnik
Sebastien Barre
Luis Ibanez