Added case for VowelCounter.
Added Palindrome checker class.
Added case for Palindrome checker.
Added Palindrome class to repository.
Now previous commit applies.
Created a word counter class.
Added a submenu for WordCounter in the TUI.
Changed wordcounter's Hashtable to use containsKey() instead of 
contains().
Changed wordcounter's Hashtable to use lowercase version of words.
Added a word-count total. (To be moved.)