Remove myaac_hooks table, load info directly from .json files and cache them

plugins/example.json

@@ -1,4 +1,5 @@
 {
+	"enabled": 0,
 	"name": "Example Plugin",
 	"description": "This is just an example of a Plugin for MyAAC.",
 	"version": "1.0",
@@ -32,4 +33,4 @@
 			"file": "plugins/example/before.php"
 		}
 	 }
- }
+ }