Add preprocessing step, based on NLTK implementation.
Finish preprocessing, add step 0
Finish step 1a
Add warnings and comments.
Add step 1b.  Needs tests.
Add comments to isShortWord
[WIP] refactor tests
Refactor tests
Add tests for step 1b.
Add step 1c
Change "Authors" to "Contributors"
Consolidate notes & warnings.
Rearrange code
Move English stemmer into an english package.
Add "RuneSlice" struct

I was creating slices of runes too much.  Now, I'll do the entire stemming on a slice of runes instead of strings.
Do not use map for special words, instead use a switch statement.
Move stopword calcuation from map to a function
Convert RuneSlice struct into Word struct
Document the Word package
Rearrange code