Fix _getTransitiveClosure: there was maximum one parent class in the list

But if you have more than one parent class on top, with this fix all of
them are now in the list.
Add Erfurt_Rdf_Model::renameResource
Remove unused code
Fix syntax error when short_open_tag is enabled
Close #50 Extending the table column sizes for storing Uris in Query Cache
Beautification of dataBase Query Cache Backend
Fix renaming elements with language attribute
Fix unit tests.
Merge branch 'develop' of github.com:AKSW/Erfurt into develop
Merge pull request #51 from kkda/feature-renameResource

Add Erfurt_Rdf_Model::renameResource
fix Erfurt build (according to CW :) )
fix testImportDBPediaResourceMachineLearningAndQueryWithTitleHelperQueryGithubIssue85
add build batch and API documentation link
fix link
fix cs issues
add some test flags to avoid timeouts in syntax tests

this only affects test-unit-cc runs.
refer to
http://stackoverflow.com/questions/10520464/what-does-phpunit-strict-mode-do
add hasO test for MemoryModel
Remove deprecated cache config pairs and adjust tests.
Fix coding standard for RDF srializer adapters
Add serializeQueryResultToString to serializer interface and throw exception if not supported