Device Components.

The purpose of this feature is to provide a framework for discovery modules to store
information in the database, without needing to add new tables for each feature.

This Feature provides:
- A database structure to store data.
- An API to store and retrieve data from the database.
- Integration to the LibreNMS APIv0.
- Ability to disable/ignore components.
- Default alerting rules.

- The API returns $COMPONENT[$device_id][$component_id] to allow pulling of data for multiple devices.
  The intent is to be able to create 'Applications' the consolidate data from applications covering multiple devices.
- Added some developer documentation

html/pages/device/edit.inc.php

@@ -38,6 +38,8 @@ else {
   $panes['storage']  = 'Storage';
   $panes['misc']     = 'Misc';
 
+  $panes['component'] = 'Components';
+
   print_optionbar_start();
 
   unset($sep);