Removed code to elevate privileges in Windows, now you must explicitly
run the manager as administrator.
Allow setting a device ID in the config file.
Changed wording from 'Device Path' to 'Device ID' (and similar ones),
this breaks previous devices configurations.
Return standard error codes in the manager.
Added plugin install path hint in Windows registry.
Added sub-command for dumping all posssible information about the
devices and configurations in XML format.
Added sub-command for listening global events.
Added sub-command for showing virtual camera version.
Now the manager recognises negative numbers as arguments instead as an
option.
The manager can execute sub-commands as root when required.
Fixed installer.
The virtual camera is working fine in both Mac and Windows.
