Stikkedizr QR and paste time fix

Fix qr image on the paste page, additional fix of the paste time
(missing language definition)
Missing exp forever.
Keep forever as default, visual fix
Stikkedizr QR fix

One more time ;)
Allow sitemaps and google veryfication html

Change in rewrite conditions in .htaccess.
Fixed harcoded path to application

Codeigniter gives possibility to change system and application directory
name. Give it a chance :)
Issue #205 removable shortcut checkbox in config

Added new $config['remove_shorturl_checkbox''].
All themes has been updated.
GeShi update to Version 1.0.8.12

https://github.com/GeSHi/geshi-1.0/blob/master/src/docs/CHANGES
Typo fix.

Thanks @glensc.
Fixed headers already send (editor trash in code)

In geshi_languages.php editor saved trash by choosing UTF-8 coding.
Should use UTF-8 without BOM instead. With this issue all image related
headers were not seen (captcha, qr codes).
Merge pull request #217 from PJanisio/master

Major updates: qr code fix, htaccess modyf, hardcoded path fix, removable short_urls in config.