improved: _getUrlVar method
fixed: lint issue and header comment
changed: !!! update jQuery / UI to 1.10.3 and make use of jQuery UI Dialog Extended Extension

Heavy rework. Now using UI Dialog extension to manage all dialog related functionalities.
simplify desc pane mechanism, add _setTitle method
improve api link mechanism
simplify demo source code
remove disableFunc, buttons are configurable now, add left / right arrow CSS, rework CSS, remove default padding, various fixes
fix show / hide mechanism
fix setDesc if undefined is given