Merge Maintenance Tasks #1

- Cleaning /common/css folder removing unused files.
- Cleaning /common/js folder removing unused files.
- Added `searchStyle.css` in /common/css. It should be merged in
`design.css`.
- Added PDF export library in /common.
- Cleaning /es directory removing unused files.
- Added `downloadFile.php`, `upload.php` and `viewCV.php` in /es folder.
Merge Maintenance Task #2

- Updated `home.php` and `validatefront.php`under /es folder.