Starting 0.2.0
Update styles. Add background opactiy option.
Using percentage for fonts. Requires knowing the size before calling `render`.
Using points for font size instead of pixels.
Putting the calculated CSS on the event data, so it can be used without needing to recalculate.
Start support for text-shadows and styling. More to do.
Merge tag '0.1.0' into develop
release 0.2.0
Merge branch 'release/0.2.0'