Merge pull request #5 from coderhaoxin/master

fix a mistake about README
0.1.0
remove charset, yield* next, fix HEAD
mtime is a string
remove yield* next for now

fix travis
socket error handling
0.1.1
Update README.md
Merge pull request #6 from Thomasdezeeuw/patch-1

files object is not a part of options
1.0.0