~jaro/balkon

ref: 0f31dc89243ba2ac965a2591c9077f941660c8e4 balkon/.golden/arabicFiller20em d---------
Implement trimming spaces at end of lines.
Make paragraphRect origin always 0,0.

This convention should make it easier for the caller to properly place
the paragraph within a document.
Add test for RTL text.