- refactored units: now handles various lengths, angles, times, etc. also handles units relative to canvas or object.
- refactored units: now handles various lengths, angles, times, etc. also handles units relative to canvas or object.

git-svn-id: 275ee7fd8b88df117a87ca679ca434adde15ab51@24 4f656584-2f64-8888-3fab-3bd369ce20a5

jwal/canvg