1. Fixed a bug that occurs after a change of style. Now folders ~/.rodovid/graphics and ~/.rodovid/locales will be symlinked to /usr/share/rodovid/graphics and /usr/share/rodovid/locales. All static files will be removed when the application starts.
2. Added export to CSV spreadsheet files.
3. Added export to PDF documents.
4. Some optimisations of menu and File Manager occurs.
