readme updates
support hsts headers

http://tools.ietf.org/html/draft-ietf-websec-strict-transport-sec-04#page-14
set max-age to 1 year
Merge pull request #36 from github/hsts

Support HSTS headers
Merge remote-tracking branch 'public/master'
cut version 2.0.3
show that the url doesn't crash. #45
Prevent camo from crashing with non-url-encoded urls

Close gh-45.
Use try/catch instead of typeof check
Fix failing test_proxy_localhost_test_server

The test server was using the content-type 'image/jpg'. The correct
mime type for JPEG images and the mime type defined in mime-types.json
is 'image/jpeg'.
Merge pull request #47 from jbuck/fix-failing-test

Fix failing test_proxy_localhost_test_server
Merge pull request #46 from jbuck/not-encoded-url

Prevent camo from crashing with non-url-encoded urls
only set the version in one place, release 2.0.4
bahhh
version 2.0.5 that works