docs: function copyReplace( src, dest, replacements ){
  
          if ( replacements ){
              var source = grunt.file.read( src );
              for ( var s in replacements ){
                  var r = replacements[s];
                  var re = new RegExp( s, "g" );
                  source = source.replace( re, r );
              }
              grunt.file.write( dest, source );
          }
          else{
              grunt.file.copy( src, dest );
          }
  
  	}