add pip support and some docs

README.md

@@ -1,43 +1,39 @@
 # Packages
 
-## Supported
+Handels package management using system and language specific package tools
 
-Only Apt and Debian Stretch.
+## Defaults
 
-Other versions might work but are not tested.
+```
+# sets the default for packages.pkg , see *pkg*
+default_packages_pkg:
+	provider: system
+```
 
-## Parameters and defaults
-
-packages:
-  pkg: {}
-  repos: {}
+## Parameters
 
 All configuration is to be placed inside the `packages` dict.
 
 ```
-# dictionary of package names to install. The key is the name of the packages, value musst be != none as none is used as knock out.
-pkg: {}
+# name: *pkg*, see below for definition
+pkg:
 
-# dictionary of repositories to setup, the key is used as name for the repository. See **repo** for definition for the content
-repos: {}
+# name: *repo*, see below for definition
+repos:
+
+```
+
+**pkg**:
+```
+# can be "system" or "pip-system"
+provider: system
 ```
 
 **repo**:
 ```
-# url to repo, example: "http://www.deb-multimedia.org stretch main non-free"
-url: ''
-
-# only set either key, keyurl or keyid + keyserver
-
-# gpg key to add for this repo
-key: ''
-
-# url to download a gpg key for this repo from
-keyurl: ''
-
-# key id of the key to add, for example "36A1D7869245C8950F966E92D8576A8BA88D21E9"
-keyid: ''
-
-# key server to get the key from, for example "keyserver.ubuntu.com"
-keyserver:
+key:
+keyid:
+keyurl:
+keyurl:
+url:
 ```