Changes related to HTTP authentication handling. Also added a few small improvements to the original implementation in the develop branch.

Conflicts:
	library/Solarium/Core/Client/Adapter/PeclHttp.php
	library/Solarium/Core/Client/Request.php
	tests/Solarium/Tests/Core/Client/Adapter/HttpTest.php
	tests/Solarium/Tests/Core/Client/RequestTest.php
	tests/Solarium/Tests/QueryType/Select/Result/Spellcheck/SpellcheckTest.php

hl.tag.pre and hl.tag.post parameters added. To be used with hl.useFastVectorHighlighting. Refer to http://wiki.apache.org/solr/HighlightingParameters/#hl.useFastVectorHighlighter

get and set methods added for hl.tag.pre and hl.tag.post. To be used with hl.useFastVectorHighlighting. Refer to http://wiki.apache.org/solr/HighlightingParameters/#hl.useFastVectorHighlighter

Added Solr param 'omitHeader' with a default value of 'true'. This saves a little traffic and parsing. Also added method to switch back on.

punctuation tweaks.

$config = array(
	'adapteroptions' =>
		array ('host' =>  '127.0.0.1', 'username' => 'user', 'password' =>
			'pass', 'port' => '8983'
		)
	);
$client = new \Solarium_Client(  $config );
// $client->setAdapter('Solarium_Client_Adapter_Curl');

Added component EDisMax

Fixed collations to be able to use multiple collations

    * http://wiki.apache.org/solr/ExtendedDisMax

Added 6 new features:

    * PhraseBigramFields
    * PhraseBigramSlop
    * PhraseTrigramFields
    * PhraseTrigramSlop
    * BoostFunctionsMult
    * UserFields

Component can be requested by using

    * $edisMax = $query->getEDisMax();

All new features are tested.