Update MOE DB.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=78775752
Rename spec file 08_observer to 08_data_binding to match the heading
inside. Also updated spec index.
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=78776080