Merge pull request objectrocket#49 from objectrocket/python3-no-long

Python3 does not have a 'long' type

Merge pull request objectrocket#38 from objectrocket/_shard_stats

pull (sharded) mongo instance stats for all shards parallely using a …

Merge pull request objectrocket#36 from objectrocket/_add_new_relic_s…

…tats_property

add new relic stats property

Merge pull request objectrocket#35 from objectrocket/_instance_settings

instance settings

Setup passenv for auto pypi upload.

Increment to 0.4.2 & update changelog.

Merge pull request objectrocket#31 from objectrocket/allow_instances_…

…extensible

Allowing instances class to be extensible.

Update changelog items for 0.4.0.