~jaro/balkon

ref: 1c79394163b5e6dcca224451d8b2d9a8c5234fa1 balkon/src/Data/Text/ParagraphLayout/Internal/LineHeight.hs -rw-r--r-- 355 bytes
Update documentation and derived instances.
Move non-public modules into Internal namespace.
Implement absolute line heights with half-leadings.