+ fixed an issue with tokens queue where its not returning the least used token
+ modified settings to ignore irrelevant codes of line in coverage
+ bug fix in length function for tokens_queue
+ bug fix in tokens_queue for rotating tokens
+ import fix for test_cio
+ added test file for helper.py
+ increased time.sleep for test_cio to decrease probability of false positives due to occasional high CPU load
+ fixed json loading in wikipedia tests (it was using load instead of loads)
Merge branch 'master' of github.com:hdt91/CS3281