don't sign body when not form-urlencoded
relax upper bound on case-insensitive
add travis ci integration
allow newer ghc
use ghc 7.4.1 instead of non-existing ghc
ehm, it does not work with ghc7.4
bump aeson dep
Merge branch 'master' of git://github.com/tel/oauthenticated
update Readme (http-conduit -> http-client)

oauthenticated uses http-client for some time now.