French thousand separator is a narrow no-break space
Make gwsetup record stderr too giving more info on errors, otherwise comm.log is quite useless
Fix: output_hashtbl should now work for OCaml 4.00+
Moved css to an external file to benefit from caching.

Properties using variables still need to be in the .txt file, but this should be improved.
Update deprecated functions
Array.create -> Array.make
Lazy.lazy_from_fun -> Lazy.from_fun
Preparing for safe_strings
Do not support non-UTF-8 bases any longer

Got rid of value utf_8_db and some dead code.
configure: check ocaml version
Force safe-string (requires OCaml 4.02+)
Conversion to -safe-string, first steps
configure: ocaml 4.02 needed
Compile with opam and OCaml 4.02