Update README
Update to a more concise syntax
Merge method contentType with content
Fix response read when no handler is set

If no handler is set, the response is read fully so that the connection
can be properly closed. When the response is returned to the caller,
the method getPayload returns an in-memory copy of the response data.
Add support for Http basic authentication
Add support for Google AppEngine authentication
Create abstract AccountManager authenticator
Fix log tag
Doc
Store response data to a file instead of a byte array
Fix method for authentication token generation
Merge branch 'master' of https://github.com/pixmob/httpclient
Update to the latest version of PixmobHttpClient
Update to the latest version of BugSense
Update to API level 17
Update version to 20