Simplify examples by adopting Spring Boot 1.4 improvements. Upgrade Cassandra Java driver to 3.0.3. Add examples for Ingalls (Query derivation, projection, Java 8 feature support).
Cassandra example setup is now self-contained by requiring just a running Cassandra instance.
Keyspace and tables are created during the tests. Examples also check if Cassandra is running and some examples additionally check the required version. Test execution is skipped if conditions are not met.
Cassandra (2.x) is started with TravisCI.
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