local dev mode. Instances can re-enable it, and BE can default it to true in config.exs

the user-card one

All translations checked with tearma.ie & acmhainn.ie for language use
and technical accuracy.

Now it's in good Occitan.

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.