Merge Codiad-Extended back to Codiad

Due to several repo crashes, I have made one big commit which might be discussed and tested as well:

- Included projectbar from circuitbomb with own enhancements
- Fixes issues from holblin
- Fixes some issues with IE9
- File Search respects the project folder
- Single click opening for folders
- Allows to have abs paths as projects
- abs paths projects are not allowed to download/open in browser
- Abstract project path from project name for renaming
- Project can be renamed on rightclicking on project root
- basic update check
- refactored config.php to be in common.php
- added close button to modal popup
- refactored active tabs to display path based on current project node
- close all button for more then 2 open files
- changing project will close all active files as well
- added new theme, called modern, for filemanager icons