* added event 'escaping.bs.modal' to modal.
 * changed default width of modal trigger.
 * fixed ajax modal.
 + added modal.bootbox.less.
 * fixed an error of mindmap.
 * fixed order index in mindmap.js.
 * removed test code.
 * updated documents.
 * updated ranzhi resources.
 * fixed style of navbar and menu.
 * added export methos to mindmap.