Fix typo & small bugs in classes\guide\view. Update vendor libs

The first "cosmetic" update:
1. Delete old & unused code (select language) in Controller\Userguide,
delete  language messages, delete guide/de-de, add Google translate.
Delete old & unused JS, upd
Update JQuery & JShighlight.
Update Markdown library + fix Kodoc classes.
View: add security line, fix classnames in PSR-0, delete bugs