Added Mobject.update capabilties, which should be nicer and lighter weight than using ContinualUpdateFromFunc all the time. Also changed the behavior of any Animation having its mobject automatically thrust up to the front of the screen

utils/simple_functions.py

@@ -1,5 +1,6 @@
 import numpy as np
 import operator as op
+import inspect
 from functools import reduce
 
 
@@ -16,6 +17,10 @@ def choose(n, r):
     numer = reduce(op.mul, range(n, n - r, -1), 1)
     return numer // denom
 
+
+def get_num_args(function):
+    return len(inspect.signature(function).parameters)
+
 # Just to have a less heavyweight name for this extremely common operation
 #
 # We may wish to have more fine-grained control over division by zero behavior