Added some tile set image files.

control_panel_static.png - Contains the present/not present icons for the control panel.

control_panel_animations.png - Contains the icon animations for the control panel.

production_book.png - Contains the images for the various production items in the book on the production screen.

production_progress.png - Contains the progress steps for each production item.

research_items.png - Contains the thumbnails for the various research items.