SOLR-5463: new 'cursorMark' request param for deep paging of sorted result sets (merge r1556036 and r1557192)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1557196 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5529: add support for queries to use multiple suggesters in SuggestComponent

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1557212 13f79535-47bb-0310-9956-ffa450edef68