Release v0.6

Added

1. Implemented the canvas attribute for the graphing utilities #4 #6
2. Support for managing a list of artist #6
3. Support for abstract class
4. Ability to select map from different configuration files #11 #16

Release v0.5

Added

1. Order of the cyclic intervals #1 #2

Fixed

1. Does not show the cyclic intervals when the map is not renormalizable #2