changed plugin specification: use generic "handle_event" instead of "setup" and "cleanup"

fixed bug in reinitializing of plugins (Closes: #111)
fixed glitch that delayed the results of the plugin_manager to go into effect by one request

plugins/plugin-interface.txt

@@ -31,10 +31,9 @@ Python code interface:
 	- function "get_status":
 		- returns a string, that describes a state connected to this plugin (e.g. the current date and
 		  time (for the "date" plugin))
-	- function "setup":
-		- may be overridden to specify bootup behaviour
-	- function "cleanup":
-		- may be overridden to specify shutdown behaviour
+	- function "handle_event(event, event_info)":
+		- may be overridden to specify event handling (e.g. "bootup", "shutdown")
+		- see src/cryptobox/plugins/base.py for details
 	- the class variable "plugin_capabilities" must be an array of strings (supported: "system" and
 	  "volume")
 	- the class variable "plugin_visibility" may contain one or more of the following items:

plugins/volume_automount/volume_automount.py

@@ -62,15 +62,16 @@ class volume_automount(cryptobox.plugins.base.CryptoBoxPlugin):
 		return "volume_automount"
 	
 
-	def setup(self):
+	def handle_event(self, event, event_info=None):
 		"""Override bootup behaviour.
 		
 		Mount all volumes marked as 'automount'.
 		"""
-		cryptobox.plugins.base.CryptoBoxPlugin.setup(self)
-		for cont in self.cbox.get_container_list():
-			if self.__is_auto_mount(cont) and not cont.is_mounted():
-				cont.mount()
+		cryptobox.plugins.base.CryptoBoxPlugin.handle_event(self, event, event_info)
+		if event == "bootup":
+			for cont in self.cbox.get_container_list():
+				if self.__is_auto_mount(cont) and not cont.is_mounted():
+					cont.mount()
 	
 
 	def is_useful(self, device):