Removed ContinualAnimation, reimplemented some of its occurances in the old_projects, added warnings for the rest

old_projects/WindingNumber.py

@@ -1,5 +1,12 @@
 from big_ol_pile_of_manim_imports import *
 
+import warnings
+warnings.warn("""
+    Warning: This file makes use of
+    ContinualAnimation, which has since
+    been deprecated
+""")
+
 import time
 
 import mpmath