added rem_var and rem_vars

bstrd/bscache.py

@@ -103,6 +103,18 @@ class BSCache:
         self.start()
 
 
+    def rem_vars(self, names):
+        self.stop()
+        for n in names:
+            del self.channels[n]
+        self.start()
+
+    def rem_var(self, name):
+        self.stop()
+        del self.channels[name]
+        self.start()
+
+
     def flush(self):
         self.pt.queue.clear()