Finding cmt files inside OPAM build dir
Currently ocamlspot requires cmt files installed to the same installation directory of the corresponding source files. There is a helper application spotinstall to do this but still it is tedious.
Developing OCamlOScope I wrote a reasonable way to find out the OPAM build dir of an OCamlFind installation dir. We can make use of it to find out cmt files in OPAM build dirs.