Fixed the issue of vanishing json literal string when passed as the data to the body. And added the relevant tests.
Merge pull request #27 from ifthikhan/master

Vanishing json literal in body
fixing PEP8 compliance
adding Travis CI
correcting Travis script rule
adding Travus build status image to README
improved standards compliance (with both oauth 1.0/a and rfc5849) regarding oauth_callback

While obtaining a request token (i.e. temporary credentials), `oauth_callback`
parameter is REQUIRED. If the client is unable to receive callbacks or a
callback URI has been established via other means, the parameter value MUST be
set to "oob" (case sensitive), to indicate an out-of-band configuration.
[OAuth 1.0/a section 6.1.1; RFC5849 section 2.1.]

Now when using OAuth1Service for fetching a request token, `oauth_callback` is
by default set to "oob", and user can redefine it with either URL params, or
body params.

Two tests are added and one updated; all changes in regard to proper
`oauth_callback` existence/value testing.
minor update of test_get_authorize_url_*

Authorize URL is not supposed to carry `oauth_callback` param, but it MAY
contain any number of additional parameters, as defined by the Service Provider.
Note that "oauth_" prefix is reserved for OAuth parameters.
pep8 fix
Merge pull request #29 from randomir/callback-required-fix

Callback required fix
enforcing testing coverage requirements
Merge branch 'master' of github.com:litl/rauth
fixing typo
changing build status image link
pep8 fixes (v1.3+ has more strict indent rules)
Minor tweaks to docs
Merge pull request #31 from takluyver/patch-1

Minor tweaks to docs
Merge pull request #30 from randomir/master

minor fixes (latest pep8 indent compat)
Update get_request_token to handle oauth_callback arugment so we can
grab oauth_verifier versus the pin approach. Included example
examples/twitter-timeline-web.py.

For details see discussions at:
https://groups.google.com/group/twitter-api-announce/tree/browse_frm/thread/472500cfe9e7cdb9/37b02c1092f9deac
https://dev.twitter.com/discussions/392
https://github.com/simplegeo/python-oauth2/issues/10
removing my callback addr