avoid array dereferencing method call for PHP <5.4
Merge pull request #94 from cokernel/avoid_array_dereferencing_method_calls

avoid array dereferencing method call for PHP <5.4
Sketches in reindex job class.
Strips background process code back out, since it chokes on the URLs.
In the helper classes, use self:: when calling static members instead of repeating the class name.
In the reindex controller action, use set_time_limit(0) to make it possible to index really large collections.
Scrubs outdated content out of the README.
Gets rid of unused URL aliases in the README.
Updates usage instructions.
Updates usage instructions.
README wordsmithing.
Adds Solr image to README.
Construct the record URLs when the results are displayed, not during indexing.
Use a background process for the reindexing.
Moves unit/integration directories down under a common 'tests' directory.
Fixes bug that was causing non-item element texts to get sucked up onto item Solr documents.
Fixes warning in results when no facets are activated.
Scrubs out commented-out URL indexing lines.
Index tags as strings, not tokenized texts.
Renames the current *_s fields to *_txt, since that's what they are.