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
/**
* @name Foo
* @class
*/
/**#@+
* @memberOf Foo#
* @field
*/
/**
* @name bar
* @type Object[]
*/
/**#@-*/
/**
* @name Foo2
* @class
*/
/**#@+
* @memberOf Foo2#
* @field
*/
/**
* @name bar
* @type Object[]
*/
/**#@-*/