Updated changelog
content-length should be bytesize instead of length (unicode!)
Merge pull request #129 from challengee/unicode-length

content-length should use bytesize instead of length
Update changelog [skip ci]
Add spec for unicode request body length header

Related to #129
Bump version to 0.6.1
Extract response status and provide some sugar.

Example:

    res = HTTP.get "http://example.com"
    fail "something wrong" unless res.status.ok?
WIP