Merge branch 'release/2.1.0-rc1'
too much divs closed in J3

This isn't really **viewable** in the backend, but in the frontend when you have left or right column and these flip under the form. It also makes a the HTML invalid, but for the backend it doesn't it makes it more worse, because if you have 30 or 32 errors doesn't count so much.
Merge pull request #126 from Skullbock/development

Fixed issue with private behavior not using alias if set
The tags helper must not be loaded on Joomla! versions earlier than 3.1
Added Travis config file
Added Joomla 2.5 and 3.1 environments
Added workaround for joined tables, since in Joomla < 3.2 I can quote the same
field twice.
Limit Travis to the staging branch, only
Added Travis config file
Added Travis config file
Hello Travis!
Merge pull request #125 from rdeutz/j3-renderer-2-much-divs-closed

too much divs closed in J3
Merge branch 'development' into staging
Update README.md
Merge pull request #130 from nikosdion/staging

Updated README.md
ServerSide Validation and fix for uncheck checkboxes

re-submit to staging as requested

added server side validation for save, you need to add a attribute in the form tag serverside_validation="true" to validate the data

I have also created a branch (https://github.com/akeeba/fof/tree/feature/serverside-validation) with these changes but it is not so much so I think a pull request can do the job.

The only thing I don't like so much is the attribute in the form definition, I think a variable validation_processor {js, server, js+server} is better extensible but this could make changes in old components necessary depending on what we chose as the default value.
Row selection checkboxes broken in Joomla! 3
Added JLayout support for FOF

Implements JLayout for FOF with the addition to look for version specific files and overwrites like default.j31.php, default.j3php, default.php
I did it a bit to complicated, reduced lines of code
Merge pull request #132 from rdeutz/layout-support

Added JLayout support for FOF
Merge branch 'refs/heads/staging' into development