(#90) Wix package to include output from WPF Project

- Added the WiX 3.8 assemblies to the SharedBinaries Folder
(#90) Wix package to include output from WPF Project

- Updated the gitignore file to exclude changes in the BuildArtifacts folder
(#90) Wix package to include output from WPF Project

- Added a new WiX Project called Chocolatey.Gui.Install
- Added the Chocolatey Icon to the Chocolatey.Gui project