Quick links to the wiki.

- The _$CreateSettingElement_ will now look for an URL in the _"help"_ property to add a link to a page which contains more information about the option.
- A new localized string has been added: __SETTINGS_HELP_ABOUT__. The _"option"_ placeholder can be used in the string to include the label of the option: _"Help about {option}."_
- Added links to the wiki for each option that has already been documented.

![links](https://f.cloud.github.com/assets/3949892/907462/8504db9e-fd3d-11e2-92e4-a4ec435ad417.png)