Configurable variable delimiter syntax

Ability to change variable reference syntax:

moustache --start-variable "{{" --stop-variable "}}"
moustache --start-variable "${" --stop-variable "}"
moustache --start-variable "((" --stop-variable "))"
moustache --start-variable "[[" --stop-variable "]]"
moustache --start-variable "<![CDATA[" --stop-variable "]]>"

[michaelstepner]

This is a good idea, and the ability to change the delimiter is a part of the Mustache spec. I'd welcome a pull request.

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.