provide a manpage for usbmount

[Karl-Philipp Richter]

Although the `usbmount` package only provides a service which isn't executed directly as a command, it'd be great to have some documentation provided as `man usbmount`. Due to the fact that `man usbmount.conf` doesn't exist as well it is overly hard to get started with the application/service.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: usbmount 0.0.22
Uname: Linux 3.17.4-031704-generic x86_64
NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CurrentDesktop: Unity
Date: Sat Dec 6 08:55:43 2014
PackageArchitecture: all
SourcePackage: usbmount
UpgradeStatus: No upgrade log present (probably fresh install)

[Lenin (gagarin)]

the scripts and configuration files are pretty transparent on what they do, and how they work,
I don't think a manpage would help here. but if you think so, please write one?

/etc/usbmount/usbmount.conf
/usr/share/usbmount/usbmount
/lib/udev/rules.d/usbmount.rules