Drop the use of resx in favor of using embedded resources directly

Drop the unnecessary use of resx (we are parsing them just like any
other text file stream, so resx didn't give us any advantage).

This'll make it easier to make alternative build profiles that
include different versions of the font metrics file or drop it
altogether.
Embed font_metrics.properties in vs10 project as well.
Merge pull request #4 from jstedfast/embedded-resources

Drop the use of resx in favor of using embedded resources directly