Upgraded to Commons FileUpload 1.3.1
Fixed broken link to jax-ws-commons website

Issue: SPR-11404
Actually log the cause of canRead/canWrite failures

Issue: SPR-11403
Fixed all List return types to ? instead of Object, restoring backwards compatibility with existing Spring 3.2.x based code and allowing easier casts to other element types

Also declaring findByExample generically based on the given example object's type.

Issue: SPR-11402
Polishing