* 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)

* implemented relation for geo_shape query

* switched position and coordinates parameters

* Switched parameters for tests as well

* Deprecated parameter position

* Overwrite relation

* fixed unit tests to support phpunit 6

* do not use sudo

* update elasticsearch in the travis env and use docker vm

* add java jdk8

* temporary remove elasticsearch scripting

* clean up travis file

* null cannot be used in count() functions anymore in 7.2

'_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

* bump development version number

* add scroll to URI parameters, fixes #201

* remove deprecated queries

* move tests

* added support for 5.x elasticsearch syntax

changed script_score lang to painless

* refactored tests to support elastic 5

* update changelog

* uri parameters was moved to container, introduced 5.0 new request body parameters

* removed filter endpoint, change order for query and postfilter

* search test has too many not necessary test cases

All those tests has to be in specific query or endpoint. Also functional tests make more sense then asserting it in the SearchTest

* moving elasticsearch/elasticsearch to required dependencies

* move queries to specific domain level folder

* fixed namespaces

* added deprecation messages

* use random_bytes instead of uniqid

on windows there is a chance to get the same uuid by using uniqid

* added PHP 5.x polyfill for the PHP7 random_bytes() method