feat(its): add sentenceWiseImprotance function

Author: sanjayaksaxena

src/its.js

@@ -33,6 +33,7 @@
 var sort4FT = require( './sort4FT.js' );
 var constants = require( './constants.js' );
 var caseMap = [ 'other', 'lowerCase', 'upperCase', 'titleCase' ];
+var swi = require( './sentence-wise-importance.js' );
 
 // Size of a single token.
 var tkSize = constants.tkSize;
@@ -162,6 +163,10 @@ its.readabilityStats = function ( rdd, addons ) {
   return addons.readabilityStats( rdd, its );
 }; // readabilityStats()
 
+its.sentenceWiseImprotance = function ( rdd ) {
+  return swi( rdd );
+}; // sentenceWiseImprotance()
+
 /* ------ utilities ------ */
 
 its.terms = function ( tf, idf, terms ) {