cache.js
function ( files ) {
        var me = this;
        files = files || [ ];

        return me.normalizeEntries( files ).filter( function ( entry ) {
          return entry.changed;
        } ).map( function ( entry ) {
          return entry.key;
        } );
      }
function ( files ) {
        var me = this;
        files = files || [ ];

        return me.normalizeEntries( files ).filter( function ( entry ) {
          return entry.changed;
        } ).map( function ( entry ) {
          return entry.key;
        } );
      }
function ( files ) { var me = this ; files = files || [ ] ; return me . normalizeEntries ( files ) . filter ( function ( entry ) { return entry . changed ; } ) . map ( function ( entry ) { return entry . key ; } ) ; }
Return the list o the files that changed compared
against the ones stored in the cache

@method getUpdated
@param files {Array} the array of files to compare against the ones in the cache
@returns {Array}
Return the list o the files that changed compared against the ones stored in the cache