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

/** the options */
opt = Opt.get(
	arguments, 
	{
	 d: "directory",
	 c: "conf",
	 "D[]": "define"
	}
);

/** configuration */
opt.conf = {
	/** keep */
	keep: true,
	/** base */
	base: getBase(this, {p: properties})
}