add basic support for aggregation framework.
add support for sub aggregations
upgrade to elasticsearch 1.0.0.RC1 - Fix CountDsl to reflect
elasticsearch breaking changes.
roll back SimpleQueryString changes from 0.90.x
Merge remote-tracking branch 'sksamuel/master' into elasticsearch-1.0

Conflicts:
	build.sbt
	src/main/scala/com/sksamuel/elastic4s/DeleteDsl.scala
	src/main/scala/com/sksamuel/elastic4s/MoreLikeThisDsl.scala
	src/main/scala/com/sksamuel/elastic4s/queries.scala
	src/test/resources/com/sksamuel/elastic4s/search_string.json
	src/test/scala/com/sksamuel/elastic4s/SearchDslTest.scala
	src/test/scala/com/sksamuel/elastic4s/UpdateTest.scala
Merge pull request #97 from nicoo/elasticsearch-1.0

Elasticsearch 1.0