Known issues in 1.2.0

Stress testing from users has exposed the following problems:

• Migrating from 1.1.4 to 1.2.0 with an .h5 file containing deleted families causes issues when trying to delete more families with 1.2.0 (various dimension mismatch complaints). - Likely user error falling back to 1.1.4 after updating to 1.2.0 since it isn't backwards compatible.
• On long runs, the following ValueError from OPTICS will sometimes be thrown: 2 neighbors per samples are required, but some samples have only 1 neighbors in precomputed graph matrix. Decrease number of neighbors used or recompute the graph with more neighbors. Problem with the correlation matrix?
• Newer versions of Bokeh throw UserWarning: no explicit representation of timezones available for np.datetime64.
• Users on Windows are unable to overwrite existing family images in outputs. Just need to replace os.rename() with os.replace().