#60 Install man pages on unix-ish platforms

[Mook]

Attached patch installs the man pages from src/debian/ on unix-ish platforms.

I'm not sure if this is the correct thing to do (presumably whoever added them to debian/ has a difference procedure for getting them installed?), but this adds them to make install. This is guarded for unix-ish platforms only, since man pages on Windows doesn't make much sense (but OS X would probably want them?)

[skid]

Applied as svn1437