Move definition of form_class

If you don't show headers or filters then you get a notice 
Notice: Undefined variable: form_class in \joomla32\libraries\fof\render\strapper.php on line 675
Merge pull request #297 from wilsonge/patch-1

Move definition of form_class
Docblock typo
Documentation update
Created a new method that cleans the current object and clones it
Close #294
Merge pull request #298 from akeeba/feature/294-fix-table-reset

Close #294
Updating COmposer
Updated the administrator area
Update bin folder
Update components folder
Update includes folder
Update layouts folder
Updated the libraries folder
Updated root files
Merge pull request #299 from akeeba/feature/update-environment

Joomla 3.2 update
Small doc block change
Merge pull request #302 from wilsonge/patch-1

Small doc block change
Updated db schema
Added relations files
gh-291
Updated default data with latest Joomla assets values
Updated links to assets table
Merge pull request #303 from akeeba/feature/update-assets

Updated test assets
Update behavior.php
Merge pull request #304 from wilsonge/patch-2

Doc block change