Enhancement - man page

Hi,

I've written a suitable man page for cdef and attached it to this issue ticket. What you need to do is give it 755 permissions and copy it into /usr/local/share/man/man1 . It'll show up as expected when you "man cdef".

[cdef.1.zip](https://github.com/ftiff/cdef/files/602076/cdef.1.zip)