Written for Ubuntu 15.04.
Add mono package sources by following instructions at:
http://www.mono-project.com/docs/getting-started/install/linux/#debian-ubuntu-and-derivatives
Then install the needed packages:
sudo apt-get install git mono-devel referenceassemblies-pcl monodevelop
git clone https://github.com/grokys/Perspex.git
Start MonoDevelop and open the Perspex.sln solution. Wait for MonoDevelop to install the
project's NuGet packages.
Set the TestApplication-Mono project as the startup project and click Run.