[metapost] Emebedding fonts from mp to eps conversion

[Troy Henderson]

I use epstopdf instead of pstopdf on my graphics because epstopdf
translates the tight PostScript BoundingBox to a tight PDF CropBox.
If you use pstopdf, you will find that your output PDF will probably
contain your graphic on a page with your default GhostScript pagesize
(e.g., usletter or a4).

Troy