feature request: Template Validator / Tests

[jvanasco]

It would be great if pystache had a tool to properly validate a template.

I slapped this together , but it could be wrong. I don't know the internals correctly, and tried to break templates a few ways.

import types
    import pystache

def validate_template(unicode_string):
    if not isinstance( unicode_string , types.UnicodeType ):
        return False
    try:
        pystache.parse(unicode_string)
        return True
    except:
        return False

It would just be great to check templates for the correct syntax , this way my applications' unit tests can always ensure that templates are valid ( without having to generate sample data and render them ).