1) Add `-latex fmtcount.ins' as a first step to fmtcount.pdf compilation, because we need fmtcount.sty for the manual (to get the list of supported languages. The `-' prefix is needed because makedtx includes some \endinput in the .dtx, and this involves an error status of the `latex fmtcount.ins' command.
2) Make squeaky target dependant of clean.
Add missing def files for supported languages into STYFILES
Protect \' for French language in order to solve http://github.com/nlct/fmtcount/issues/15