support sections and lambdas

[trenkert]

support for mustache sections and lambdas would be very much appreaciated. Great project overall!

[michaelstepner]

Pull requests that implement more features of the Mustache spec are welcome! I've pasted the contributing section from the README below.

Contributing

Project Status: Inactive

This code is not being actively developed. It was created to fulfill my pandoc writing needs, and the current feature set is adequate for me.

If you have a feature request, it is unlikely that I will be able to implement it for you. You can create an issue to generate discussion. If you implement a feature, you can file pull request and I will review it eventually, as time permits. If you're interested in making major additions to the code, I'd be happy to welcome a new maintainer to the project.