Make missing strings translatable, update locale files and German (#19)

* Make a bunch of strings translatable

* Update locale files

* Update German translation

locale/signs_lib.ru.tr

@@ -1,27 +1,12 @@
 # textdomain: signs_lib
 Locked sign, owned by @1@n=защищенная табличка, пренадлежит @1@n
+Skims through all currently-loaded sign-bearing mapblocks, clears away any entities within each sign's node space, and regenerates their text entities, if any.=
+There are no signs in the currently-loaded terrain.=
+Found a total of @1 sign nodes across @2 blocks.=
+Regenerating sign entities ...=
+Finished.=
 Write=записать
-@1 wrote "@2" to sign at @3=
-@1 flipped the wide-font switch to "@2" at @3=
-@1 flipped the unicode-font switch to "@2" at @3=
-
-
-##### not used anymore #####
-
-locked =защищенный 
-@1 wrote "@2" to @3sign at @4=@1 записал "@2" в @3sign на @4
-Sign=табличка
-Can edit all locked signs=Может редактировать все защищенные таблички
-Locked Sign=защищенная табличка
-green=зеленая
-yellow=желтая
-red=красная
-white_red=краснобелая
-white_black=чернобелая
-orange=оранжевая
-blue=синея
-brown=коричневая
-Sign (@1, metal)=Табличка (@1, металл)
-Attempt to register unknown node as fence=Попытка зарегистрировать неизвестный узел как забор
-Registered @1 and @2=Зарегистрировано @1 для @2
-[MOD] signs loaded=[MOD] мод табличек загружен
+Unicode font=
+Wide font=
+Wooden Wall Sign=
+Steel Wall Sign=