v0.1.0-alpha.3

This preproduction release adds the following:

• The Centroid-based Silhouette (cSIL) CVI
• Explicit imports that allow the user to access the CVI modules from the top package level (i.e., cvi.cSIL)

What's Changed

• Make imports explicit, add modules to top level by @AP6YC in #17
• Feature/csil by @AP6YC in #20
• Release/v0.1.0 alpha.3 by @AP6YC in #22

Full Changelog: v0.1.0-alpha.2...v0.1.0-alpha.3