po: Copied missing translations from the 2.0 branch.

* po/LINGUAS: Add new translations.
--

Note that be.ru and pt_BR.po have not been copied because they have
way too less translated strings (74, 290 out of 2054).  The current
stats are:

  ca.po: 464 translated, 1024 fuzzy translations, 566 untranslated.
  cs.po: 1719 translated, 317 fuzzy translations, 18 untranslated.
  da.po: 1468 translated, 444 fuzzy translations, 142 untranslated.
  de.po: 2052 translated, 1 fuzzy translation, 1 untranslated message.
  el.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  eo.po: 331 translated, 1109 fuzzy translations, 614 untranslated.
  es.po: 1455 translated, 461 fuzzy translations, 138 untranslated.
  et.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  fi.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  fr.po: 2052 translated, 1 fuzzy translation, 1 untranslated message.
  gl.po: 458 translated, 1044 fuzzy translations, 552 untranslated.
  hu.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  id.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  it.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  ja.po: 2022 translated, 23 fuzzy translations, 9 untranslated.
  nb.po: 684 translated, 635 fuzzy translations, 735 untranslated.
  pl.po: 1469 translated, 443 fuzzy translations, 142 untranslated.
  pt.po: 400 translated, 1057 fuzzy translations, 597 untranslated.
  ro.po: 874 translated, 726 fuzzy translations, 454 untranslated.
  ru.po: 1257 translated, 478 fuzzy translations, 319 untranslated.
  sk.po: 460 translated, 1025 fuzzy translations, 569 untranslated.
  sv.po: 1452 translated, 458 fuzzy translations, 144 untranslated.
  tr.po: 1386 translated, 494 fuzzy translations, 174 untranslated.
  uk.po: 2016 translated, 27 fuzzy translations, 11 untranslated.
  zh_CN.po: 927 translated, 690 fuzzy translations, 437 untranslated.
  zh_TW.po: 1471 translated, 447 fuzzy translations, 136 untranslated.

po/LINGUAS

@@ -1,30 +1,28 @@
-#en@quot
+en@quot
-#en@boldquot
+en@boldquot
-#be
+ca
-#ca
+cs
-#cs
+da
-#da
 de
-#eo
+eo
-#el
+el
-#es
+es
-#et
+et
-#fi
+fi
 fr
-#gl
+gl
-#hu
+hu
-#id
+id
-#it
+it
 ja
-#nb
+nb
-#pl
+pl
-#pt_BR
+pt
-#pt
+ro
-#ro
+ru
-#ru
+sk
-#sk
+sv
-#sv
+tr
-#tr
 uk
-#zh_TW
+zh_TW
-#zh_CN
+zh_CN