Remove most (outdated) images from manual to save space

Help/Contents.hhc

Help/gzdb/features/all_modes/colorpicker.html

Help/gzdb/features/all_modes/colorpicker.jpg

Help/gzdb/features/all_modes/event_lines.html

Help/gzdb/features/all_modes/event_lines1.jpg

Help/gzdb/features/all_modes/event_lines2.jpg

Help/gzdb/features/all_modes/incremental_tags1.jpg

Help/gzdb/features/all_modes/incremental_tags2.jpg

Help/gzdb/features/all_modes/jitter.html

Help/gzdb/features/all_modes/jitter2.jpg

Help/gzdb/features/all_modes/jitter3.jpg

Help/gzdb/features/all_modes/jitter_sectors.jpg

Help/gzdb/features/all_modes/jitter_things.jpg

Help/gzdb/features/all_modes/jitter_update.jpg

Help/gzdb/features/all_modes/jitter_verts.jpg

Help/gzdb/features/all_modes/synch_cam1.jpg

Help/gzdb/features/all_modes/synch_cam2.jpg

Help/gzdb/features/all_modes/synch_cam3.jpg

Help/gzdb/features/all_modes/synch_cam4.jpg

Help/gzdb/features/all_modes/synch_camera.html