Improve wot view
- [x] Display membership status: - member? - sentry? - outdistanced? - excluded? - revoked? - date of expiration of the membership document - date of expiration of the first of the five recent certifications - use a summary chart? ~~- [ ] rename `wot` (as wot would be the name of a tool to explore the wot) to `membership` alias `ms` (membership is also problematic as for sending membership document).~~ --- - [x] Display whether certifications have been written into the blockchain or if it's into the sandbox. From `/wot/requirents/<pubkey>`. - [x] display certification stock
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