~jaro/balkon

ref: 7b9e4eca85fc54332421f9edea4108d8c0363e0b balkon/.golden/lineHeightSmaller/golden -rw-r--r-- 469 bytes
Add ignored prefixes and suffixes to test data.

This ensures that implementation does not rely on the texts having zero
offset inside their byte arrays.
Use top edge for placing lines.
Implement absolute line heights with half-leadings.