motion events relative to the previous mouse position. for
example, if two mouse events arrive, the first at x+1,y and
the second at x+2,y, we used to compute deltas of 1,0 and 2,0
instead of 1,0 and 1,0. that's fixed. also worked around a
bug (probably) in windows that caused a motion event after a
SetCursorPos() to be lost or reported one pixel off from the
correct position. now using mouse_event() which doesn't
have that problem. also fixed calculation of normalized
coordinates for mouse_event() when there are multiple
displays.
clipboard owner support (MS windows done, X windows partial)
added key transfer on ms windows
mutex fixes in CClient (had race conditions)
faster debug output in ms windows
changed temporary screen name to "secondary"
network fixes on ms windows (poll returned wrong result)
fixed transparent cursor on ms windows
