Added .vs directory to gitignore - this is the VS2015 project info directory
Added .vs directory to gitignore - this is the VS2015 project info directory

malcolmr/nodatime,nodatime/nodatime,BenJenkinson/nodatime,malcolmr/nodatime,malcolmr/nodatime,jskeet/nodatime,BenJenkinson/nodatime,nodatime/nodatime,malcolmr/nodatime,jskeet/nodatime