Merge pull request #25 from RichardWarburton/master

Adds support for the Command Operation
inced version
added CONTRIBUTING.md
create artifact with mod classifier
removed some system.out
autoConnectRetry
inced release
always produce a jar
inced version
inced versions
inced release
fixed vers and jars
inced vers
Fixed null pointer when stopping
Merge pull request #26 from danthegoodman/master

Stop throws NPE if exception occurs in construction
Merge pull request #24 from zilet/master

autoConnectRetry Mongo option added
Removed hardcoded value SAFE for write-concern.
Merge pull request #27 from aschrijver/master

Removed hardcoded value SAFE for write-concern.
Add back dropCollection to the Persistor.

Add documentation for count, getCollections, DropCollection, and CollectionStats.

Fixed a couple of typos.

Added tests for drop collections combined with getCollections, and also a test for CollectionStats
Comment assert check which fails on CI, because of their setup