Easier serialization for Spark about glint HOT 1 CLOSED

The pull and push methods return a scala Future. To attach callbacks to these futures we will need access to the execution context regardless. Therefor I think it is best to keep the execution context in the call.

To simplify the code a little bit, we can change the implicit timeout to a configurable property and remove it from the call API. The most recent version of the code uses a hand-shake protocol for push request, so the timeout property is largely ignored there anyway.

In the mean-time, I've written a very simple example about serialization with Spark in the documentation, that can be run very easily in the spark-shell: http://rjagerman.github.io/glint/gettingstarted/spark/

from glint.