New formula: MVPTree

Not submitted upstream. The author expects the make install rule to be run as root: it installs the lib with 444 rights, then runs ranlib on the installed lib. Of course, if not run as root (as is the case with homebrew), ranlib can't work as it does not have the rights to write to the file.
The fix installs the lib with 644, then run ranlib, then chmod the lib to 444.