v2.0 beta-2 (formerly v1.3 beta-2) - for internal testing

Feature freeze.

New features from moderator team request:

• Add .notes watches to retrieve active watch records (#12)
• Add "Spotlight Host" role management to spotlight showcase (#9)

Fixes:

• Improve error messages with usage info
• Modnotes: .notes add - accept 'starts', 'start', 'time', 'expire', 'ends', 'end' keywords
• Modnotes: .notes add - better validation of keyword args
• Modnotes: renamed .notes usearch to .notes finduser
• Modnotes: renamed .notes link to .notes group