#1 Help component

[Thomas Christensen]

Add a helplink that works like popuplink but uses a SPI
(service provider interface) to fetch help html text.
The only thing needed on the html template using the
helplink should be
<a href="dummy_help.html" jwcid="@HelpLink"
helpid="22"/>. Clicking on the help icon should open
the helptext with id 22 in a separate window.
This component should be supported by a HelpService
that renders the link with an icon (should be
changable) and that requests the help text from a
HelpTextProvider implementor. If the HelpService is in
"editor" mode, clicking the help icon should open an
editor in a new window allowing the text to be specified.