make sure all intermediate stream bodies will be destroy and have error handle
fix length when .body is missing
Merge pull request #259 from dead-horse/fix-length

fix length when .body is missing
Merge pull request #255 from dead-horse/stream-body

make sure all intermediate stream bodies will be destroy
refactor
Release 0.5.5
simplify respond
Merge pull request #261 from dead-horse/simplify-respond

simplify respond
ocd
add string HEAD support test
add buffer HEAD support tests
refactor