colors and output
bugfix member variable, no dependency against tsplib
test tsplib import/export on a simple square
use a L-system to generate a penrose tiling and save it in the TSPlib format
I/O for the EO format, remove commented test
Adds a A* implementation
Adds an Ant Colony Algorithm for euclidian TSP
new module name for "turtle"
Better variable names
Use dictionaries instead of index list in ant_colony

Everything use cities tuples as keys.
Better names in ant_colony
bugfix: graph conversion, append after key creation
ant_colony returns pheromones matrix
adds a separated module for plotting
one script to rule them all
bugfix tsplib indexing