Update Cache.php

Fixed an example of using buildKey in the doc
jQuery UI accordion rework
Overcoding removed ;)
Example from comments changed
Fixed docs for Sortable.
Merge pull request #412 from creocoder/jui-accordion-rework

[READY] jQuery UI accordion rework
Merge pull request #411 from votintsev/master

Fixed an example of using buildKey in the doc
minor css fix for ErrorHandler

conflicting css class and bad positioned icon