add windows installation and configuration notes

0-Intro.md

@@ -65,7 +65,13 @@ sudo apt-get install git
 ```
 
 ### installation on windows
-[git project page](https://git-scm.com/)
+- [Download](https://git-scm.com/download/win)
+    - choose 64 bit
+    - portable if you do not have admin rights
+- default install options look OK
+- Git Bash
+- Windows Explorer context menue has *Git Bash Here* and *Git GUI Here* options
+- Windows credential window will pop up when accessing remotes with authentication
 
 ### navigate and manipulate on cli
 - pwd
@@ -84,6 +90,7 @@ git config --global user.name "Your Name"
 git config --global user.email "your.name@idiv.de"
 ```
 - eventually additionally configuration for windows/linux/mac stuff
+    - line break configuration done during install for windows
 - eventually mention difference global local
 
 ## short break (optional)