Production web site with foundation (WIP)

Initial support for a capable and modern-looking front-end for the Ska web service, including:

- [x] Kadi events browser
- [ ] ~~Kadi commands browser~~
- [x] Mica obsid browser (@jeanconn)
- [ ] ~~Telemetry browser (@matthewdahmer)~~
- [ ] ~~Kadi event web service API~~

The latter 4 items are not required for this PR.  Still to do for this PR however:

- [x] Main landing page at root level
- [x] Top bar navigation
- [ ] ~~Do kadi event listview filtering via pulldown/text box within each column *[Won't do]*~~
- [x] Obsid links to mica pages where relevant
- [ ] ~~Twitter-style infinite scrolling of event lists (eliminate paging) [won't do]~~
- [x] Regenerate and remove secret key from public content