Propagate SetBindings settings in the copy constructor.
Make sure that set bindings respect the library setting on their contributing modules.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=54924803

Conflicts:
	core/src/main/java/dagger/internal/SetBinding.java
Merge pull request #347 from cgruber/fixsetbindings

Fix interactions between SetBindings and library settings.