Make the formula fully pillar driven/customizable

- split package and param into separate state files
- use defaults.yml to specify all configurable options of the formula
- setup map.jinja to read in defaults.yml, filter by os_family for
  Arch, and merge in sysctl:lookup pillar
- Updated README

sysctl/init.sls

@@ -1,23 +1,6 @@
-{% from "sysctl/map.jinja" import sysctl with context %}
-
-sysctl:
-  pkg.installed:
-    - name: {{ sysctl.pkg|json }}
-
-{%- set config = pillar.get("sysctl", {} )%}
-{%- for name, item in config.get('params', {}).items() %}
-{%- if item == None -%}
-{% set item = {} -%}
-{%- endif -%}
-{%- set value = item.get('value', {}) %}
-{%- set config = item.get('config') %}
-
-{{ name }}:
-  sysctl.present:
-    - name: {{ name }}
-    - value: {{ value }}
-    {%- if 'config' in item %}
-    - config: {{ sysctl.config_location}}/{{ config }}
-    {%- endif %}
-{%- endfor -%}
+# -*- coding: utf-8 -*-
+# vim: ft=sls
 
+include:
+  - sysctl.package
+  - sysctl.param