main:
 - [x] translated: de.yml - Status: peer-reviewed
 - [x] translated: lang\de\ - Status: peer-reviewed
 - [x] added: "de: Deutsch in other ymls"

resources:
 * untranslated: moneropedia - some terms added to match de.yml
 * untranslated: user guides
 * untranslated:  developer guides

Special thanks to ErCiccione and rodolfo912 as well as to rbrunner7

Sorry for throwing everything into one commit, splitting my changes
to individual will probably take ages.

* grammar:
    * a/an
    * repeated words
    * fragmented sentences
    * possesion
    * run on sentences
    * commas for prepositional phrases
    * is/are conjugations
    * was/were
    * its/it's
    * capitalizing proper nouns (Monero, Bitcoin, etc)
    * formatting (removed linefeeds in middle of sentences)
    * can not/cannot
    * removed commas improperly before conjunctions
* spelling:
    * programmatically
    * hashrate
    * transferring
    * scalability
    * separate
    * transactions
    * additionally
    * particular
    * profitability
    * recommended
    * explicitly
    * separator
    * block
    * drawback
    * favorite
* spelling (br/us)
    * internationalization
    * specialized
    * analyze
    * centralized
    * decentalized
    * memorizing
    * synchronization
    * synchronized