Support hyphenation

[propensive]

A hyphenation algorithm would allow better rendering of natural language text in columns, though the implementation is likely to be nontrivial.

[propensive]

Hyphenation could run as a separate step (and should possibly be implemented as a completely separate project) prior to insertion into a table, and would insert soft hyphens at various points within words, which would then be interpreted by Escritoire if propensive/escritoire#9 is implemented.

[propensive]

The algorithm is explained reasonably well here.