Multilanguage templates

It's about this issue: https://github.com/eduardolundgren/gulp-umd/issues/3

I replaced JavaScript-specific options to abstract data, and do what we need with this arrays in template.
Here my template for LiveScript: https://github.com/unclechu/js-useful-umd-modules/blob/410a040d63ce1f093638aab064dccda5d9e1ec52/_dev/umd_template_1.3.ls but no need to include this template to gulp-umd, cause this syntax is LiveScript version-specific. But with this pull request we can just write a template for new language (CoffeeScript ot TypeScript for example).