Added support for custom button texts + Added support for deleting markers + reworked the way the "+" and "-" buttons work + Added a "placeholder" marker when clicking "+" to show where in the timeline the marker will be posted
// /**#=+
// * {
// * 'D': 'Date.prototype',
// * '$N': 'Number'
// * }
// */
// var D = Date.prototype,
// $N = Number;
//
// D.locale = function(){
// };
//
// /**
// @return {string} The cardinal number string.
// */
// $N.nth = function(n){
// };
//
// LOAD.file = function(){
// }
//
// /**#=-*/