textutils: add ALA-LC transliteration
- Adds textutils methods for ALA-LC transliteration as described by http://www.loc.gov/catdir/cpso/roman.html (closes #1092).
Reviewed-by: Lars Holm Nielsen <lars.holm.nielsen@cern.ch>
Tested-by: Tibor Simko <tibor.simko@cern.ch>