0.2.0

Recent additions:

• Use static renderer for mesh output on readthedocs (#121)
• Fix API inconsistencies (#114)
• Fix labels in TetraMesh.show_submesh(), and document usage in notebook (#112)
• Implement multi-domain meshing for 3D data using tetgen, see example notebook (#105, #107, #108)
• Add function to pad 2D mesh and example notebook (#103)
• Update documentation for minimum_bounding_rectangle() (#102)
• Add notebook demonstrating regionprops to examine pore properties from 2D image (#101)
• Add banner for project in the readme (#96)
• Implement aligned region of interest selection using FFTs (#94)
• Set up bump2version to version bump with a single command (#95)