Merge remote-tracking branch 'origin/master' into comewithmeifyouwanttowork

Conflicts:
	data/model/legacy.py
	static/js/app.js

util/backoff.py

@@ -0,0 +1,5 @@
+def exponential_backoff(attempts, scaling_factor, base):
+  backoff = 5 * (pow(2, attempts) - 1)
+  backoff_time = backoff * scaling_factor
+  retry_at = backoff_time/10 + base
+  return retry_at

util/collections.py

@@ -0,0 +1,12 @@
+class AttrDict(dict):
+  def __init__(self, *args, **kwargs):
+    super(AttrDict, self).__init__(*args, **kwargs)
+    self.__dict__ = self
+
+  @classmethod
+  def deep_copy(cls, attr_dict):
+    copy = AttrDict(attr_dict)
+    for key, value in copy.items():
+      if isinstance(value, AttrDict):
+        copy[key] = cls.deep_copy(value)
+    return copy