* fixes #257 - added $format arg to date histogram

* fixed typo

Example `['from' => 0, 'to' => 0]` is a valid aggregate range

There are situation where adding multiple queries is super beneficial. 

This PR enables package users to call `$search->addQueries(...)` in two different ways.

#### Single dimension array parameter

In this case an array of `BuilderInterface $query` are passed to the root `$search->addQuery()` function.

#### Multi dimensional array parameter

In this case an array of arrays is passed in, each member of the array is to match the function signature of `$search->addQuery()` and the PHP 5.4 traversable unpacking language feature is used to parameterise the root `$search->addQuery()` function.

(cherry picked from commit 8458ac9)

(cherry picked from commit 8600bf0)

* implemented relation for geo_shape query

* switched position and coordinates parameters

* Switched parameters for tests as well

* Deprecated parameter position

* Overwrite relation

'_source_exclude' and '_source_include' was missing in parameters whitelist.

* Getter for nested query.

Currently there is not possibility to get query object when it is wrapped inside nested query.

* Exposing path for nested query.

* Removing not needed space.

* added documentation for geo distance range query

* added a deprecation message to geo distance range query

* updated the readme

* copied the release info to changelog

* updated the how to section on filters

* updated the regexp queery docs: changed filter to query

* reorganized query docs

* added in progress... to new doc files