consider updating simple_oauth to 0.3.1

[pravi]

We try to keep only one version of the library in debian and we already have 0.3.1 in the archive. This will help us maintain twitter-stream package in debian.

[pravi]

Also consider updating http_parser.rb to 0.6.0

[pravi]

@rud can we do this?

[rud]

I'm sorry, I am no longer actively using this project.

[rud]

As always: Merge requests with good tests would be much appreciated by anyone meeting the same challenge.