To remove jaggedness of outlines, we now set context.lineJoin to `round`.
After doing this, I realized that lots of letters where still being cut
off on both sides. It turns out the bounding width of the letter that
we compute is actually wider than the browser computed width. Using our
own values prevented the cutoff.
I still want to test this more with a variety of fonts and settings to
make sure it's good, any help in that area is appreciated.
I used thie jsFiddle to compare our per-letter rendering to typical "whole"
word rendering in browsers: http://jsfiddle.net/AbdiasSoftware/48m4B/2/
We should match the bad kerning and all.
Fonts also look better at smaller resolutions now, so I removed the label
hack I had in simple.czml.
Fixes#1141
Shehzan Mohammed
Matthew Amato
hpinkos