Deprecate MySQL driver based on deprecated PHP mysql extension
Merge pull request #4124 from mbabker/deprecate_mysql

Deprecate MySQL driver based on deprecated PHP mysql extension
[imp][32033] Removing MooTools dependencies from overrider.js. Closes #4128
[imp][34063] Responsive tweaks to com_installer > manage. Closes #4101.
[imp] Updating to FOF 2.3.4. Closes #4089
Merge remote-tracking branch 'joomla/3.4-dev' into pdo_mysql