~jaro/balkon

ref: 0e0791b319a7ed4ac45cfdcb0bf08d0dabac6410 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.