MITLM on OSX Yosemite

What I had to do to build mitlm on OSX (Yosemite 10.10.3).

1. Install missing tools/libs
   • Download gfortran 4.9 from here.
   • Install autoconf, automake and libtool. (gist below)
2. Add #include <string> to FastIO.h, after #include <cstring>
3. Had to remove tr1 in some sorce files, but this issues seems to be resolved in the current repo code.
4. autogen.sh
5. make
6. sudo make install