Translated Discourse to Danish.

Squashed commit of the following:

commit db81f4a15e5df5ceb64499aba077acd2f8aed192
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Fri Mar 22 23:10:25 2013 +0100

    All the user-facing server strings.

commit c7fdf0d4351664cd2a731556b99ecf7f05a09cde
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Fri Mar 22 22:43:53 2013 +0100

    Like -> Synes godt om.

commit 0f6ba13d65e31246a0a0a9a31707928a14d7220c
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Fri Mar 22 21:27:51 2013 +0100

    Lots of server strings.

commit d66af8246fb6bc9ccff51f97931f1375b07f2d85
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Fri Mar 22 19:48:53 2013 +0100

    Translated user facing strings (almost).

commit a84fcf6ff70d7c304c86263d7917207e505e77b1
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Thu Mar 21 22:15:20 2013 +0100

    Even more client strings.

commit ccfc0f7189fb979973b642bee9ec1440f7d39970
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Mon Mar 18 22:43:08 2013 +0100

    More client strings.

commit c3e21cab82d95ad5abe92e95ad99acf401cbe9ec
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Mon Mar 18 22:12:44 2013 +0100

    Translated a bunch of client strings.

commit 65aad7129b3d9c7df62213522b37e3a413df35de
Author: Mikkel Hoegh <mikkel@hoegh.org>
Date:   Mon Mar 18 22:09:28 2013 +0100

    Started work on Danish translation.
cs translation update
Italian Translation!
Merge pull request #565 from alpacaaa/it_locale

Italian Translation!
add icon-quote glyph to quote reply pop-up button
Merge pull request #564 from kubabrecka/cs_update19

cs translation update
Merge pull request #493 from mikl/danish-translation

Danish translation.
Stub for actually enabling the Danish translation.
Oops, missed a spot.
Merge pull request #566 from mikl/danish-translation-enabling-stub

Stub for actually enabling the Danish translation.
Add twitter, facebook, and google plus links to share dialog