change text rendering to faster svg text elements.
re-calculated sizes.
insert after for proper z-sorting.
Removes Bitstream font.
Changes background rendering to texts.
Removes some IE-specific fixes in favor of generic rendering.
Removes padding and restores text alignment.
Restore aggregations.

This also fixes some comments and removes some more browser-specific
code. Captions in aggregations are disabled.
Restores labels in aggregations.
Changelog.