Add *.swp files to .gitignore (#180)
Add *.swp files to .gitignore (#180)

This makes `git status` much nicer for vim users.
tbayaa/lerna,lerna/lerna,sebmck/lerna,FaHeymann/lerna,treshugart/lerna,dmfenton/lerna,evocateur/lerna,lerna/lerna,onigoetz/lerna-hg,lerna/lerna,evocateur/lerna,kittens/lerna,asini/asini,doug-wade/lerna,sveisvei/lerna