Added .gitattributes
Added nuget files to .gitignore

This reverts commit f044736c309e34be4c3420caaad59dd8e70043ee.
Added VS solution and project
Added setup project
Added Caliburn Micro framework
Configured application bootstrapper
Implemented Autofac integration
Created project for DesktopTimer.Core assembly
Created project for DesktopTimer.Domain assembly
Implemented timer storage
Implemented timer management UI
Implemented timer UI
Setup: Added start menu and startup shortcuts