Major update.  Added Grouping.

OtterEngine now allows 'Groups'.  Using the same 'seed' for a tag will
add it to a group.  Those groups can then be all rendered with one tag.

Example:
$otter->addLink('link1','http://mylink1.com','My Link 1');
$otter->addLink('link1','http://mylink2.com','My Link 2');
$otter->addLink('link1','http://google.com', 'My Link 3');

In the html/template, placing {{link1}} will result it all three defined
'link1' tags being rendered.  This does not include forms defined with
addForm, incrementals, or blocks.