Add support for java.lang.Float field type

[colesico]

An exception is occurring on such field: Caused by: com.typesafe.config.ConfigException$BadBean: Bean property XXX of class YYY has unsupported type class java.lang.Float

[cloudpaul]

This is still a problem, so I'm hoping you'll be able to add support for float. I want to use ConfigBeanFactory to create objects from generated classes which I don't control and are full of floats. Without float support I have to load each field separately, which is extremely tedious.