skip unknown genes

src/io/maf_file_reader.js

@@ -178,6 +178,9 @@ morpheus.MafFileReader.prototype = {
 				sampleIdToIndex.set(sample, columnIndex);
 			}
 			var gene = String(tokens[geneSymbolColumn]);
+			if (gene === 'Unknown') {
+				continue;
+			}
 			if (this.geneFilter == null
 					|| this.geneFilter.has(tokens[geneSymbolColumn])) {
 				var rowIndex = geneSymbolToIndex.get(gene);
@@ -257,7 +260,7 @@ morpheus.MafFileReader.prototype = {
 		if (ccfColumnIndex !== undefined) {
 			dataset.addSeries({
 				dataType : 'object',
-				name : 'ccf',
+				name : 'allelic_fraction',
 				array : ccfMatrix
 			});
 		}