created utils library to avoid duplicate functions

pulled XbmcBackup class into separate library

resources/lib/utils.py

@@ -0,0 +1,21 @@
+import xbmc
+import xbmcaddon
+
+__addon_id__= 'script.xbmcbackup'
+__Addon = xbmcaddon.Addon(__addon_id__)
+
+#global functions for logging and encoding
+def log(message,loglevel=xbmc.LOGNOTICE):
+    xbmc.log(encode(__addon_id__ + ": " + message),level=loglevel)
+
+def getSetting(name):
+    return __Addon.getSetting(name)
+
+def setSetting(name,value):
+    __Addon.setSetting(name,value)
+    
+def getString(string_id):
+    return __Addon.getLocalizedString(string_id)
+
+def encode(string):
+    return string.encode('UTF-8','replace')