Move top-level stuff into wreq directory

--HG--
rename : LICENSE => wreq/LICENSE
rename : Network/WReq.hs => wreq/Network/WReq.hs
rename : Network/WReq/Internal.hs => wreq/Network/WReq/Internal.hs
rename : Network/WReq/Internal/Lens.hs => wreq/Network/WReq/Internal/Lens.hs
rename : Network/WReq/Internal/Link.hs => wreq/Network/WReq/Internal/Link.hs
rename : Network/WReq/Internal/Types.hs => wreq/Network/WReq/Internal/Types.hs
rename : Network/WReq/Lens.hs => wreq/Network/WReq/Lens.hs
rename : Network/WReq/Lens/Machinery.hs => wreq/Network/WReq/Lens/Machinery.hs
rename : Network/WReq/Session.hs => wreq/Network/WReq/Session.hs
rename : Network/WReq/Types.hs => wreq/Network/WReq/Types.hs
rename : Setup.hs => wreq/Setup.hs
rename : httpbin/HttpBin.hs => wreq/httpbin/HttpBin.hs
rename : tests/Tests.hs => wreq/tests/Tests.hs
rename : wreq.cabal => wreq/wreq.cabal
extra : amend_source : 10ec48b622818274a5e139ec2f614dc4499d6b21