+ add string.js.
 * updated icon image of kindeditor.
 * updated colorset.
 * updated example of kindeditor.
 + added messager.
 * fixed style of card condensed.
 * rebuild resources.
 * ajusted style of choosen.
 * added style of text.
 * ajusted style of list-group.
 + added dashboard.
 * updated dashboard.
 * removed comments.
 * ajusted code format, removed unused code.
 * added theme.less.
 * removed useless files.
 * updated theme.less.
 + added datetimepicker.
 * updated datetimepicker.
 * updated datetimepicker.