apachesolr_attachments 6.x-2.0-alpha2

#815104 by ebeyrent, pwolanin minimal handling for failed Solr extraction.
#817066 by ebeyrent, fix call to undefined function apachesolr_index_updated.
#698672 by Agileware, fix ids so files get deleted from the index on cron.
#698694 by pwolanin, retain information on removed files during cache clear.
#666090 by pwolanin, add cron settings to the UI.
#506526 by pwolanin, Preserve file paths on Windows.
#664154 by pwolanin, Update for RC4 of ApacheSolr module and updated schema 0.9.4
#616426 by pwolanin, set extractFormat as 'text' for Solr Cell.