added *.swo into gitignore
added *.swo into gitignore

simudream/nodeenv,twmt/nodeenv,Milstein/nodeenv,chriskuehl/nodeenv,jamesblunt/nodeenv,asottile/nodeenv,jamesblunt/nodeenv,jhermann/nodeenv,twmt/nodeenv,Milstein/nodeenv,chriskuehl/nodeenv,asottile/nodeenv,simudream/nodeenv