started on reproducing #654 and in the process found what made #658 / #659 fail
Merge branch 'master' of github.com:elasticsearch/elasticsearch-net
Merge pull request #660 from gmarz/master

Changed index size stats from ints to longs
fix #654 async always threw exceptions on 404, Elasticsearch.Net is now in charge which methods allow 404
Merge branch 'master' of github.com:elasticsearch/elasticsearch-net
fix #657 fix #662 fix #655 some integration tests we're ignored which caused me to miss that the serializer simplification commits broke quite a few integration tests
Implemented the HttpClient version of the IConnection interface.
Fixed some issues with the Accept headers sent over the wire.
Changed the HttpClient to be single instance, instead of transient with every request.
refactored indexing profiling project so that Testers are easier to implement
favor continuoing async steps on the same thread (need to happen sequentially anyway)