No Content-Length for 204 or 304.

It's better that the field `Content-Length` is cleared
when the status code is 204 or 304, according to RFC 2616
sec 4.4, sec 10.2.5 and sec 10.3.5.
URL-decode before calling 'fromBS' in pathArg. Fixes #175.
Merge pull request #173 from favonia/no-content-length-for-304

No Content-Length for 204 or 304.
added addCookies to RequestBuilder and Snap.Test
Merge pull request #176 from henrylaxen/master

Add addCookies to Snap.Test
Fix #177: compatible Eq and Ord instances for Method.
Merge pull request #178 from meiersi/fix-method-ord-instance

Fix #117: compatible Eq and Ord instances for Method.
Downgrade hashable.
Change hashable dep on testsuite also.
Blacklist bad versions of hashable (closes #164)
Add some more default mime types.
Merge branch '0.9-stable'

Conflicts:
	snap-core.cabal
Merge branch '0.9-stable'
Merge branch '0.9-stable'

Conflicts:
	snap-core.cabal
Bump attoparsec and text deps.
Merge branch '0.9-stable'
Merge remote-tracking branch 'upstream/master' into nonascii-filenames

Conflicts:
	src/Snap/Util/FileServe.hs