Restore line spacing from version 2.001 in OTF fonts.

Using TTX, I've modified all three vertical metric fields to have a consistent ascent of 935 and descent of 265, to match what was defined in the previous release of the fonts. (See comments on issue #33 for discussion/explanation.) This should ensure consistent line spacing across Windows, Mac OS and Linux.

TODO: The other formats (TTF, EOT, WOFF) still need to be regenerated based on these.