add vi .swp files to gitignore
add vi .swp files to gitignore

johnchase/lab-website,kschwarzberg/gregcaporaso.github.com-1,Kleptobismol/gregcaporaso.github.com-1,anderspitman/gregcaporaso.github.com,kschwarzberg/gregcaporaso.github.com-1,johnchase/lab-website,gregcaporaso/gregcaporaso.github.com,anderspitman/gregcaporaso.github.com,gregcaporaso/gregcaporaso.github.com,Kleptobismol/gregcaporaso.github.com-1