Add option to display monitors side by side

[Lars Noodén]

lxrandr has the option to "Show the same screen on both laptop LCD and external monitor" It should also have the option to "Show laptop LCD left of external monitor" and "Show laptop LCD right of external monitor" Those options would position the LCD and external monitor side by side. These are missing currently and should be added.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: lxrandr 0.1.2-3
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CurrentDesktop: LXDE
Date: Thu Mar 13 08:58:16 2014
InstallationDate: Installed on 2014-03-07 (5 days ago)
InstallationMedia: Lubuntu 14.04 "Trusty Tahr" - Alpha amd64+mac (20140307)
SourcePackage: lxrandr
UpgradeStatus: No upgrade log present (probably fresh install)
xrandr_output: Error: [Errno 2] No such file or directory: 'udisks'