Add support for plain text config.
add docs description for plain text config.
resolve the missing default key problem.
Merge pull request #51 from tonyseek/feature/accept-plain-text-config

Add support for plain text config item
No need for indent
New cache module
Fix cache and oauth2 contrib
Fix test cases for contrib oauth2
rename to bind_cache_grant and bind_sqlalchemy
Changes in docs
Add changelog for 0.4.0
Correct header authorization field

A HTTP Basic authentication request uses 'Authorization' in the response header. See also http://tools.ietf.org/html/rfc6749#section-2.3.1
Merge pull request #52 from misja/master

Correct header authorization field
Fix test cases for #52
Delete useless header transform in extract_params.
Reformat logging.
Remove import log from utils.
Version bump 0.4.0
Fix for #53

set request.client from token upon validating bearer token.
Get request.client the right way. Add access_token on request. #53