Optional Error Handling

[ChrisTalman]

Emboss is currently very strict concerning errors. If an undefined variable or wrong type occurs, the compiled template function will throw a JavaScript error and abort.

This could be made optional. An Emboss parameter could provide two options. First, as now, a JavaScript error could be thrown in the case of an error. Second, an error could be handled silently, leaving the Emboss tag in question to fail silently. Other options may also be useful.