per-property lazy loading

[mhgrove]

use the existing proxy stuff to lazy load each individual field. might want a flag to enable this. The JPA annotations like OneToMany or ManyToMany can specify this, but they don't really make sense for primitive fields, so we might want to introduce a flag on RdfProperty or a new annotation to control this. This field/annotation should probably also override anything specified by OneToMany/ManyToMany, etc.

[mhgrove]

looks like might have to switch from javassist to aspectj (http://www.eclipse.org/aspectj/). I don't see any way to create a field level proxy with javassist, in which case, this is a bigger migration than i would have hoped.