First implementation of table development tools

To get you started try the following:

   make
   cd table-dev
   ./dict_submit_frequency_list --help
   ./dict_submit_entries --help
   ./suggest_entries --help
   ./suggest_chunks --help
   ../tools/lou_trace --help

There is room for lots of improvements. More information will follow at
http://liblouis.org/todo/Table_development_tools