Fixes & Hubl branding

Contains:

• Rebrand as Hubl (Readme, Widgets, CSS, all mentions of Sib App or Happy Dev)
• Default favicon and logo is now Startinblox
• Using cdn.startinblox.com instead of cdn.happy-dev.fr
• Readme update & fixes
• Migration to sib-chat@0.6
• Lighten config.sample.json file
• Remove libLocal and rework dependencies.pug to a more logical structure
• Split JS on different files for more readability
• Reactive store workaround fixes
• clientFavicon variable
• Fixed direct access to MUC (Still one issue on sib-router for o2o)
• Fixed circle-left never showing
• Fixed hubl-bind-user2input
• Fixed fullname (username) on o2o chat title
• Fixed fullname on left menu
• Fixed tables size
• Removed group from user admin
• Also few other fixes.

--

Still:

• Workaround of the workaround of the workaround of Reactive Store does not works fine with federation fixed by framework/sib-core!359 (merged)
• Workaround for binding user to sib-form on join is buggy - looks like a race issue Fixed by a workaround server side, removing all workarounds of workaround on client side, they don't work, too much race issues.