Conflicts:
	library/Solarium/Plugin/BufferedAdd/BufferedAdd.php

Official Solr wiki entry to the remove command: https://cwiki.apache.org/confluence/display/solr/Updating+Parts+of+Documents

At this moment travis is testing only against PHP 5.5 and symfony-dispatcher 2.5.x.
This patch is fixing travis for testing against all listed PHP and symfony-dispatcher versions.

Added ExtractOnly parameter for Extractor Handler

Conflicts:
	composer.json

Increase test coverage

Test ZendHttp adapter in CI environment

CURL and PECL_HTTP adapters set connection timeout and dns cache timeout.

CURL and PECL_HTTP adapters set connection timeout and dns cache timeout (which is equal to "timeout" option value)

Fixes: #267

Fixes: #267

Revert "Excludes on stats"

Close <pre> tag in 1.1 example code

Excludes on stats

Add wildcard behavior for null endpoints in rangeQuery.

I believe the '*' range feature is a pretty common usecase of range
queries.  Right now, passing null to this function generates an invalid
SOLR phrase like 'field:[5 TO ]'.  Users can of course pass '*' to the
helper, but supporting null makes this common usecase easier to handle.

For example,

```php
$minValue = $request->get('min'); // returns null if min not specified
$maxValue = $request->get('max'); // returns null if max not specified
$range = $helper->rangeQuery('value', $minValue, $maxValue);
```