Update de_DE.lang

I looked over that translation, correctet & added some. For more translations i'll need some more informations.

179: context needed, Is this the measurement unit? a component? a machine?
181&182: context needed, is this the same Item? ist this the whole Staircase?
188-190: Translatet to German that doest sound great, so maybe dont change These, in German is no word that meens the same as Dungon in this Case
277: context needed, ist this like "increase"? or "to grow sth."?
278: context needed, is this like "cultivate/farm"?
279: context needed, is this like "amplify"?
281: context needed
284: context needed, is this a guideline or a manual?
287: This Text is correct if it is a hyperlink
322: schould that be the Temprature of the Hull?
353: context needed, is the adjustment wrong or is the structure wrong?
360: context needed
363: context needed, this schould be the current speed or? The Word "Momentangeschw." is common used in technical calculations or physics. and is more an discription and can't be used in the context : "Current Speed 50 m/s"
372: context needed, 
386: context needed, what is meaned by entity?
384 & 388: context needed, depens on 179
484: context needed, is this message displayed for the Player like "You recieved the... "?
512 - 547: Translation needed?
590 - 648: Translation needed?