Merge pull request #9 from AhoyM/master

Added Karma-Jasmine tests for JS exponent and mergeSort functions.
add simple prime_arr method
Merge branch 'master' of https://github.com/reichert621/recursion-exercises
add a couple ruby exercises
Added karma-jasmine tests for JS recursive sum exercises
Organization bitches
Added Rspec test for Ruby #combine_sorted_lists