Testing '#find_words" with each method - partially complete, but why on
earth did I write '#find_words_without' that way???  To be fixed
shortly.
Commented out 'find_words_without' for now - need some documentation
Fixed '#longer_than' & '#shorter_than' to actually mean what they say.
Added the rest of method tests through '#find_words'.  Added a test for
giving three parameters to '#find_words'.
Fixed "find_words"
Fixed '#without'