View: small comment fixes
form.html: fieldset customization

with this we can at least add some attributes to fieldset tag in forms.
Form_Basic: extend addSeparator

With this extension we can set at least some new attributes to fieldsets with addSeparator.
For example,
```
$form->addSeparator('span6',array('id'='foo','style'='color:red'));
```
Merge pull request #247 from DarkSide666/patch-8

slightly extend addSeparator for customization