Add setQuery() method to Elastica\Query\ConstantScore

@see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/query-dsl-constant-score-query.html
Merge pull request #653 from krzaczek/patch-1

Add setQuery() method to Elastica\Query\ConstantScore
Update elasticsearch to version 1.3.0
Update changes.txt file
Merge pull request #656 from ruflin/es-1.3.0

Update elasticsearch to version 1.3.0
Prepare release v1.3.0.0
Merge pull request #657 from ruflin/release-1.3.0.0

Prepare release v1.3.0.0
Add connection pool and strategies
Add tests, minor fixes
fixes after code review
add elastica exception
minor changes
Merge pull request #661 from chabior/master

Connection pool & round robin strategy
Updated required elasticsearch Version
Updated required elasticsearch Version
test Util::escapeTerm() in a query
Fixed escaping of / in escapeTerm, removed unneeded JSON_UNESCAPED_SLASHES
Merge pull request #668 from kostiklv/escaping-fix

Fix escaping of /
Merge pull request #667 from OskarStark/master

Updated required elasticsearch Version