added to mail settings, to send emails to log file, useful for debuging
Update jQuery files

Demo theme: v1.10.2 -> v1.11.1
Backend: v2.0.3 -> v2.1.1
Furthermore I renamed the jquery-2.0.3.min.js file because of easy to
update jQuery in future.
Merge pull request #798 from nnmer/master

added to mail settings, to send emails to log file, useful for debuging
Merge pull request #800 from gergo85/master

Optimized images and update jQuery
Minor refs #798