v0.7.2

• Lots of improvements to the documentation. The tutorial pages can now be downloaded and run interactively as Jupyter notebooks. The entire user guide is also available as a PDF file.
• The sub_id and hop_id modifier arguments can now be compared directly with their friendly string names. For example, this makes it possible to write sub_id == 'A' instead of the old sub_id == lattice['A'] and hop_id == 'gamma1' instead of hop_id == lattice('gamma1').
• The site state modifier can automatically remove dangling sites which have less than a certain number of neighbors (set using the min_neighbors decorator argument).
• Added optional sites argument for state, position, and onsite energy modifiers. It can be used instead of the x, y, z, sub_id arguments and contains a few helper methods. See the modifier API reference for more information.
• Fixed a bug where using a single KPM object for multiple calculations could return wrong results.
• Experimental hopping_generator which can be used to add a new hopping family connecting arbitrary sites independent of the main Lattice definition. This is useful for creating additional local hoppings, e.g. to model defects.