~jaro/balkon

ref: 507174ff69b021a52e2e740e01d12a632b7cc317 balkon/.golden/mixedLanguageLTRParagraph d---------
Make paragraphRect origin always 0,0.

This convention should make it easier for the caller to properly place
the paragraph within a document.
Use top edge for placing lines.
Calculate "normal" line height and pen position.
Upgrade Fragment to contain pen position.
Implement "plain" interface.