updated packaging_repositories documentation

README.md

@@ -15,30 +15,15 @@ packaging_repositories:
   * description:
     * This is a list of dictionaries for the reporsitories of a package management and contains some information about them.
     * Every list entry has following keys by default:
-      - name: name of the repository as string
-      - url: URL of the repository as string
-      - enabled: activation state of the repository as boolean
+      - name: name of the repository as string (optional)
+      - url: URL of the repository as string (default: 1. system_local_mirror, 2. system_home_mirror)
+      - enabled: activation state of the repository as boolean (default: true)
+      - release: release(-name) of the repository as string (required)
+      - subrepos: list of subrepos (optional)
+      - options: list of options (optional)
     * The keys of each entry can be extended depending on the package manangement.
   * default: []
      
-Processes
-=========
-
-main
-----
-
-1. NOP
-
-configure
----------
-
-1. NOP
-
-installsoftware
----------------
-
-1. NOP
-
 
 Features
 ========