make imprint and data privacy noticy accessible from eevery page

src/DataPrivacy.md

-# Data Privacy
-
-Please see [Terms of Use](TermsOfUse.md) § 9 until further notice. 

src/Legal.md

+# Legal
+
+## Imprint
+
+Please refer to the [imprint of the IT Center of RWTH Aachen University](https://www.itc.rwth-aachen.de/cms/IT-Center/Footer/Service/~epvv/Impressum/?lidx=1).
+
+## Data Privacy
+
+Please see [Terms of Use](TermsOfUse.md) § 9 until further notice. 

src/README.md

@@ -47,13 +47,5 @@ _RWTHjupyter_ runs on a [highly-available Kubernetes cluster](http://kubernetes.
 
 ### 2019-06 The RWTHjupyter proposal has been funded by the Project "[Digitale Lehr-/Lerninfrastrukturen DH NRW](https://www.dh.nrw/foerderung)"
 
-## Contact
-
-- jupyter-owner@lists.rwth-aachen.de
-
 <img alt="EON Energy Research Center" src="./images/eonerc.png" width=400 />
 <img alt="IT Center" src="./images/itc.png" width=400 />
-
-## Imprint
-
-Please refer to the [imprint of the IT Center of RWTH Aachen University](https://www.itc.rwth-aachen.de/cms/IT-Center/Footer/Service/~epvv/Impressum/?lidx=1).

src/SUMMARY.md

@@ -13,3 +13,5 @@
   - [New Profiles](instructors/NewProfiles.md)
 - [Statistics](Statistics.md)
 - [Contact & Support](Contact.md)
+
+[Legal](Legal.md)