Don't need this no mo'
Prepare to return a slice of WordSets, not a map.
Split SnarfDict into public and private functions

The public function takes a file name; the private function takes
a *bufio.Reader.  Presumably this will make it easier to test.
New, not-yet-used function dictmap_to_slice
Wire up dictmap_to_slice
New "word_acceptable" function, and fix off-by-one error.

Now the number of entries is correct according to the "stats" file.
Bug fix -- WordToBag did its multiplication with fixed-size ints, which lost precision.
Rename a variable
Nix unused import
Add some progress logging
Stub for the final function
Thoughts
Use "gob"s instead of strings as keys in our dict ...

... because we can easily convert them back to big.Ints
Start thining about decoding the bag gobs.
made Bag somewhat more of a proper data abstraction
Outline the algorithm
Nix debug spew
Display output, such as it is
Nix debug spew
Stub more of the algorithm