More active development

Hello,

because of time concerns in the past I was not able to test pull requests and merge them in a reasonable amount of time. Fortunately after asking @fcambus for help, he accepted, and that's the idea:
- For a pull request to be accepted, both I and @fcambus need to agree about the feature, in order to reduce bloat.
- After 2 weeks a given PR was opened, if one of the two still did not expressed his idea, the other is authorized to act unilaterally.

For contributions, please in general try to:
- Keep it simple.
- Add only things that are generally useful for most installations.
- Don't use Ruby magic.
- Always benchmark if page generation time regressed sensibly.

Lamer news point is that's simple and fast, and as a side effect it is also a good Redis programming example.
Still we need it to evolve, but would be cool to keep this spirit. Thanks!