Patch version of 2.7, released on 23-Jul-2016

Following fixes will be included.

• #1215: Problem with type specialization for Maps with @JsonDeserialize(as=subtype)
• #1279: Ensure DOM parsing defaults to not expanding external entities
• #1288: Type id not exposed for JsonTypeInfo.As.EXTERNAL_PROPERTY even when visible set to true
• #1301: Problem with JavaType.toString() for recursive (self-referential) types

• #7: (afterburner) Afterburner excludes serialization of some null-valued Object properties
• #12: (mrbean) Problem deserializing Long into Calendar with mrBean
• #13: (paranamer) Make ParanamerAnnotationIntrospector serializable