YamlBeans does not properly handle explicit local tags

[Atry]

According to the Primary Handle section in YAML specification 1.2, !mypackage.MyClass is by default the shorthand of !<!mypackage.MyClass>. Unfortunately, YamlBeans does not parse !<!mypackage.MyClass>, which can be produced by other YAML libraries like js-yaml.

[NathanSweet]

I'm afraid I probably won't have time to dig around in the parser any time soon. A PR to fix this would be appreciated!