Add new method 'removeOption'

[moregeek]

• Added a new method to dynamically remove options form the multi-select.
• Added Tests for the new method 'removeOption'.
• Added Tests for the existing method 'addOption'.
• Added documentaion patch to apply on the html files on loudev.com

[soWizardly]

I actually copy/pasted this into my project, and after some testing...it appears that an adjustment needs to be made for this to work properly.

'removeOption' : function(options){
  var that = this;

  if (options.value) options = [options];
  $.each(options, function(index, option){

    // Option value needs to be passed through that.sanitize first.
    option.id = that.sanitize(option.value);

    if (option.value && that.$element.find("option[value='"+option.value+"']").length === 1){
      that.$element.find("option[value='" + option.value + "']").remove();

      // and now the below works properly...
      that.$container.find("ul.ms-list [id^='" + option.id + "']").remove();
    }
  })
 },