Removed extra blank line
Added Node class
Made Node constructor more generic
Fixed repetitive import lines
Added some unit tests for a node class
Finished unittests for Node class
Finalized the node class and its unit tests
Beginning switch to node class
Changing tuples to Points
Back to a working state!
Changed (x,y) tuples into Node class
Updated code to use Node and fixed python>=3.4 issue with format
Merge branch 'dev'
Updated README