Added support for scan of SOLR indexes. To enable support, add the following request...

	<!-- Terms Component http://wiki.apache.org/solr/TermsComponent A
		component to return terms and document frequency of those terms
	  -->
	<searchComponent name="terms" class="solr.TermsComponent" />

	<!-- A request handler for demonstrating the terms component -->
	<requestHandler name="/terms" class="solr.SearchHandler"
					startup="lazy">
		<lst name="defaults">
			<bool name="terms">true</bool>
		</lst>
		<arr name="components">
			<str>terms</str>
		</arr>
	</requestHandler>