Translate not only timeago prefix, but time units. Make consistent the translation for "bio" and add ellipsis to the default status text.

* bio: presentació
* timeline: flux [d'entrades]
* post/status: entrada
* settings: configuració
* user: usuari/a
* users: usuàries
* background: fons de pantalla
* banner: fons de perfil
* follower: seguidor/a
* follow: contacte/a qui segueixo
* avatar: avatar
* [visibility] scope: abast de la publicació

Translation based on https://www.softcatala.org/guia-estil-de-softcatala/convencions-de-format/ and http://www.termcat.cat/ca/Cercaterm/ .

also fixed potential mess-up between api/static configs

Add option to config.json, disabled by default.

https://github.com/fontello/fontello/issues/513#issuecomment-237551101 helped.

streamlined. adjusted CSS so that all text in header of post is on same
baseline and all icons/images are middle-aligned.

This reverts merge request !291

change external link icon, move chat from side panel to floating, hide own bio, prevent body/app from scrolling horizontally.

default schemes.

Move custom theming from settings to style-switcher, remove usage of custom .css files, use styles.json instead.

Add a config.json option for enabling registration, don't link and redirect away from register page when it's disabled.

Move user-finder into navbar and hide it behind a toggle button, update fontello icons with user-plus and menu.