spullara/mustache.java — pull request #82 by sammerry (2013-11-15 20:53:06+00:00)
Title: Optionally throws exception on null and empty string.

Allow exceptions to be thrown on null and empty string. This is handy for cases like email templating where you need mustache to be cautious about a missing tags.

```
MustacheFactory mf = new DefaultMustacheFactory();
mf.setExceptionProne(true);
```