initial state copied from sesion 7
initial state copied from session 7
initial state copied from session 7
restoring to initial state
restoring to initial state
implemented all methods to pass test
implemented pytest of count_evens method
removed 'if name = main' testing. Testing available in separate file
implemented for pytest of ack.py
removed 'if name = main' testing. Testing available in separate file
implemented for pytest of series.py
fixed incorrect content in docstring
removed 'if name = main' testing. Testing available in separate file
implemented for pytest of rot13.py
Merge pull request #127 from kgentner/circles

circles, test_ack, test_count_evens, test_rot13, test_series