* adding a client side chai testing framework
* to run the tests, start a local python server 'python -m SimpleHTTPServer 8000', and run 'open SpecRunner.html'
* we need to run a webserver so that we can load files on the client side chai system
* only one dummy test so far
* first version of wordFrequency
* wordFrequency returns a list of Strings ordered by word frequency, the most frequently occurring word first.
* the words are separated by whitespaces and special characters (anything that is not from a-z or A-Z)