v0.2.0

ScikitSpatial v0.2.0

Merged pull requests:

• Fix test action (#1) (@ajhynes7)
• Add is_parallel, is_perpendicular, intersect (#2) (@ajhynes7)
• Develop (#3) (@ajhynes7)
• Add Circle (#4) (@ajhynes7)
• Add Circle and Sphere as type aliases of Hypersphere (#5) (@ajhynes7)
• Add method to intersect two planes (#6) (@ajhynes7)
• Begin documentation (#7) (@ajhynes7)