Initial import

Converted over from old hunspell-nds-0.1.zip, added extension
config and Makefile.
FSF had moved a while ago.
Bring suggestion matching up to par.

 - extend list of try characters to German charset
 - add near-miss list for QWERTZ keyboard
 - add list of common misspellings
 - minimal compound parameter setup
Play with compound rules, make one example work.