Remove non-go1.1 selector

The struct attribute "X>Y,attr" is no longer accepted.  The structure
promoted the resource[name] attribute to the Resource field.  Instead,
create a Resource type and just handle the attribute unmarshaling like
other structs.

https://groups.google.com/forum/?fromgroups#!topic/golang-checkins/gBibrMfJkSs

Closes #62