blog (atom feed): fixed atom handling: - atom generation code moved from backend to Libervia - replaced hardcoded urls by urls based on request path - added xmpp: uri as alternate links - feed id was not unique (it was the node), now it is the quoted xmpp uri - atom:updated was using current time which is wrong, now take the more recent item "updated" value - link elements where missing attributes (e.g.: type) - added correct http(s) links for each items - microblog items (without title) now use an abstract of content as title - use 20 as max_items for atom feeds (may change in the future) - removed bad use of encode

The file otr.min.js includes:
    - minified versions of the following otr.js dependencies:
      otr/dep/bigint.js otr/dep/crypto.js otr/dep/eventemitter.js
      The following minification tool has been used: yui compressor
    - minified version of otr.js taken from the project homepage

All original files can be retrieved from otr.js repository:
    https://github.com/arlolra/otr/tree/master/build

See the README file of Libervia, or inside otr.min.js itself for licence information.