punctuation tweaks.

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.

- corrected the input format for the datetime objects (prefix timestamps with @)
- fixed timezone issue by forcing UTC
- refactored formatDate into a single function and without duplicate date objects