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
- 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
- update check
- refactored config.php to be in common.php