Initial commit

Added classes to process a (hard-coded) paragraph of text:
+ return json object (structure not yet to spec, however) with
++ count of unique words 
++ omit (partial hard-coded) list of "stopwords"
++ aggregate count of stopwords
To-dos:
+ Read & tokenize stopwords.txt
+ Download & parse xml
+ (Extension) Prompt user for count of articles to parse
+ (Extension) Prompt user for url