missing manpages for binaries

None of the binaries installed by the unity-system-compositor have manual pages.

An excerpt from Lintian analysis of the Deb package follows.

W: unity-system-compositor: binary-without-manpage usr/sbin/unity-system-compositor
W: unity-system-compositor: binary-without-manpage usr/bin/unity-system-compositor-spinner
W: unity-system-compositor: binary-without-manpage usr/sbin/unity-system-compositor.sleep
N:
N: Each binary in /usr/bin, /usr/sbin, /bin, /sbin or /usr/games should
N: have a manual page
N:
N: Note that though the man program has the capability to check for several
N: program names in the NAMES section, each of these programs should have
N: its own manual page (a symbolic link to the appropriate manual page is
N: sufficient) because other manual page viewers such as xman or tkman
N: don't support this.
N:
N: If the name of the man page differs from the binary by case, man may be
N: able to find it anyway; however, it is still best practice to make the
N: case of the man page match the case of the binary.
N:
N: If the man pages are provided by another package on which this package
N: depends, lintian may not be able to determine that man pages are
N: available. In this case, after confirming that all binaries do have man
N: pages after this package and its dependencies are installed, please add
N: a lintian override.
N:
N: Refer to Debian Policy Manual section 12.1 (Manual pages) for details.