Update to Lucene 4.10.0

Closes #44.
Create branch es-1.4 for elasticsearch 1.4.0
Upgrade to Lucene 4.10.1 snapshot
Upgrade to Lucene 4.10.1
Update to elasticsearch 1.4.0.Beta1

(cherry picked from commit f47babb)
Tests: index.version.created must be set

Due to this [change](https://github.com/elasticsearch/elasticsearch/pull/8018), we need to fix our tests for elasticsearch 1.4.0 and above.

Closes #47.

(cherry picked from commit 3a90982)