quick succession of operations returns 500

[Tom Aratyn]

Steps to reproduce:

1. open web dev network panel of browser
2. complate a todo
3. repeate #1 as many times as possible in two or three seconds (10 or so should be enough).

Expected results:

A serres of PUT requests with 200 responses are visible in the network panel

Actual results:

200 responses are followed by 500 responses. Error message is: "Sorry, this request could not be processed. Please try again later.".

[Tom Aratyn]

I think this might be overly aggressive tastypie throttling.

[Tom Aratyn]

Backbone models only send ids of related models.

It seems that sending full recursive related models makes tastypie sad.

fixes #49

→ <<cset 1c76d61936ba>>