Create de_DE.lang

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Update de_DE.lang

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Update de_DE.lang

Finished Translating Everything. Some Stuff might need better translations since I'm not acquainted to the terminology of chemists & engineers.
Should Wrought Iron be translated into Schmiedeeisen or Schweißeisen? Haven't done any thorough research about this issue.
Merge pull request #2 from TrinaryBrain/master

German Translation