FOFModel save with FOFForm and fieldsets

Hi Nic,

I'm saving articles based on article.xml.

FOFForm works until it finds attribs/show_title.

In this case, FOFFormField has id=attribs_show_title.

When $form->getField is executed, it's returning no field with $form->getField('attribs_show_title');

So, the change submits $form->getField('show_title', 'attribs'); to get the right field.

Also, validateResult is initialized with true to avoid a warning.

Regards,
Anibal
Merge pull request #167 from anibalsanchez/patch-1

FOFModel save with FOFForm and fieldsets
Close #165
Add Joomla formatter for FOFLess
Update to lessc 0.3.9
fixes #166 (Error when deleting entry of FOFTable which is using assets)
Fixing CSV compatibility with Excel 2007 and Excel 2010
Remove jquery.ui.tooltip.js from AkeebaStrapper::jQueryUI(). It breaks Joomla 3 tooltips.
Also load JHtml::_('behavior.multiselect') in Joomla 2.5 and for FOFRenderJoomla
Merge pull request #168 from akeeba/feature/165-fofform-dtd

Close #165 - Adding DTD for XML forms
Merge pull request #170 from mbabker/less039

Update to lessc 0.3.9
Merge pull request #171 from amotools/development

fixes #166 (Error when deleting entry of FOFTable which is using assets)
Merge pull request #173 from twentronix/fix-tooltips

Remove jquery.ui.tooltip.js from AkeebaStrapper::jQueryUI(). It breaks Joomla 3 tooltips.
Merge pull request #174 from twentronix/fix-multiselect

Also load JHtml::_('behavior.multiselect') in Joomla 2.5 and for FOFRend...
Merge pull request #169 from mbabker/jformatter

Add Joomla formatter for FOFLess
Merge branch 'development' of github.com:akeeba/fof into development
Adding changelog
Render FOFFormHeaderFieldsearchable with class 'btn' when no button class is provided
Save space by only using icons for the buttons of FOFFormHeaderFieldsearchable

Language strings are added as a title
Use tooltips for fieldsearchable