mouse behavior on multimonitor windows systems. Those errors
broke synergy on all windows systems running as a server.
Also added an attempt to reduce the occasional jump that can
occur when switching screens when windows is the server.
synergy.cpp and server.cpp into cmd/synergyd as synergyd.cpp.
Moved and renamed related files. Moved remaining source files
into lib/.... Modified and added makefiles as appropriate.
Result is that library files are under lib with each library
in its own directory and program files are under cmd with each
command in its own directory.
