To cache the serialized result of an API request we need to intercept
earlier in the cycle to look in the cache and if we don't find anything
run through most of the code that used to be in Resource.get_list() in
CachedResourceJob.fetch().

Change memcached binding library to pylibmc. This requires
libmemcached-dev.

Conflicts:

	scripts/deployment/pip/requirements/2_rsr.txt