[fix] Fix script 'cesium-plus-pod --help'

[enh] Config: rename some option for moderation

[enh] Core: Add config's options 'duniter.blockchain.movement.includes.comment' and 'duniter.blockchain.movement.excludes.comment' to filter movements;
[enh] User: add moderators pubkeys config's option, to allow doc deletion from some moderators

[fix] Fix email HTML content (add missing tag, and better style)
[fix] Add missing message event i18n (duniter.user.event.FOLLOW_RECEIVED)