official endpoint

[Will Laurance]

Per Rob's email:

"""
If you maintain any code that talks to Appygram, it should be sending feedback to:

https://arecibo.appygram.com/appygrams

and traces to:

https://arecibo.appygram.com/traces

If you use the appygram-rails gem, you should upgrade it to 1.0.5, which will take care of this for you.
"""