VideoSurface: aspect ratio
partial fix for #426
CameraWorker: cleanup, poll at 60Hz
simplified VideoSource, interface, BRG->YUV conversion changes + more
NetVideoSource, YUV shader, fixes
cleanup
fix #416, cleanup
fixed compilation error + warning
fixed css, comments, cleanup
fixed infinite recursion under certain conditions
Settings: use QTabWidget, IdentityForm: cleanup
fixes, cleanup
moved src/widget/camera.* to src/camera.*
allow drag&drop on GroupWidget
EmoticonsWidget: Do not close on misclick (#393)
fixup! NetVideoSource, YUV shader, fixes
css tweaks
fix #445
ui tweaks
fix #438