Make the default font size 10 pt.

Makes the exception text fit in the box a bit better, but it still
clips over on the right side a bit.
Make SMALL_FONT a little bigger in relation to the default font size.
Merge branch 'master' of https://github.com/andreasgal/j2me.js into smaller-font
Merge pull request #66 from fzzzy/smaller-font

Make the default font size 10 pt.