Minor
[subset] Remove unnecessary workaround
Remove eexecOp C extension

It hasn't been working:

  https://github.com/khaledhosny/fonttools/commit/6102ba7500171966c436aac0eb61185c26c5fcdd

And it's only used to load Type1 fonts, so who cares if the Python
implementation is slow...
[subset] Fixup --recommended-glyphs
Add support for FontForge time stamp table

Fixes https://github.com/behdad/fonttools/issues/56
Simplify Count writing

Needed for MATH table.
Allow specifying table type as converter

Needed for upcoming MATH table.
Implement MATH table

Fixes https://github.com/behdad/fonttools/issues/67
Actually add M_A_T_H_.py
Merge remote-tracking branch 'upstream/master'