modified backup.py to test dropbox api

added start of vfs.py to abstract file repos

resources/lib/vfs.py

@@ -0,0 +1,17 @@
+import utils as utils
+
+class Vfs:
+    type = 'none'
+    
+    def __init__(type):
+        self.type = type
+
+    def listdir(directory):
+        return {}
+
+    def mkdir(directory):
+        return True
+
+    def copy(source,dest):
+        return True
+