support Access-Control-Request-Headers
cleaned up
got rid of unnecessary .get call
Send an explicit Content-Length header with /drip/

It's useful for testing tools which track the progress of a request to know
the content length ahead of time.

Test included. I've verified that the new tests do fail without this change,
response.content_length is None if an explicit Content-Length isn't set.
Show way to run httpbin as a python module.

It's already there, may as well mention how to run httpbin without gunicorn.
more meta updates
Merge pull request #166 from shurane/patch-1

Show way to run httpbin as a python module.
Merge pull request #158 from derflocki/wp-allow-headers

support Access-Control-Request-Headers
GH-168: Add newline to end of page

Fixes GH-168
Merge pull request #160 from rictic/master

Send an explicit Content-Length header with /drip/
Merge branch 'GH-168' of https://github.com/msabramo/httpbin into msabramo-GH-168
Merge branch 'msabramo-GH-168'
Add .travis.yml for Travis CI
Fix Travis py34 failure

by not relying on core.pyc file in test
README.md: Add Travis CI build badge
Merge pull request #184 from msabramo/travis

Add .travis.yml for Travis CI
Procfile: Add newline to end of file

Because that's a UNIX convention - see
http://stackoverflow.com/questions/729692/why-should-files-end-with-a-newline
Merge pull request #188 from msabramo/add_newline_to_end_of_Procfile

Procfile: Add newline to end of file
Fix /redirect to return absolute URL