Issue #1918012 by mkalkbrenner: Solr query needs to be aware of more context such as Search Page ID
Issue #1954302 by mkalkbrenner: Added Isolate some re-usable code from apachesolr_index_entity_to_documents().
Issue #2268477 by mkalkbrenner: apachesolr_index_node_solr_document() breaks node object for further usage
updated CHANGELOG.txt