Install script: updated $system_timezone

Get system timezone with date_default_timezone_get() function
Add .gitignore
Install script: update languages list
Install script: updates
Shortcodes API: shortcode name issue #53
Pages Plugin: expand improvments #27. and fixed delete action
Admin Default Theme: #27 add .btn-expand class
Merge pull request #56 from mbarzda/patch-1

Install script: updates
Merge pull request #58 from mbarzda/patch-3

Add .gitignore
Pages Table: expand field added
Localization: UK translations added #54
Installer: add UK locale
Update Twitter Bootstrap to Version 2.2.1 #59
Update markitUp! to Version 1.1.13 #60
Sitemap: links title issue #61
Pages Plugin: add page "access" feature
Pages Plugin: changed tab "seo" to "metadata"
Pages Table: field "access" added
Information Plugin: add "Directory Permissions" tab.
Default Admin Theme: improvments