new test case testing multiline response headers
Rename test case
Merge branch 'master' into 'headers'
Run benchmarks from Makefile
Move HttpParseExceptopn to Types.hs
Add header parsing code from new-snap-server

Copy header parsing code from the Snap Framework snap-core and
new-snap-server packages, incorporating the highly tuned code
written by Gregory Collins, used with permission.
Clean up attrophied code from ResponseParser
Refine repeat header test
Intercalate repeated headers with ','

Thanks to Gregory Collins for having realized the correct location to
fix this bug.

Closes #13.
Merge branch 'headers'