Don't pass StorageLevel to SparkLoadTask. It should be accessible through Hive table metadata properties.
No need to pass storage levels to ddl tasks in semantic analysis.
Remove getAllKeyStrings() from MemoryMetadataManager.
Some more cleanup in SparkLoadTask.
Some logging for MemoryMetadataManager for resting unified table SerDes during shutdown.
Some more cleanup in load and semantic analyzers.
Support handling altered "shark.cache" properties.
Rewrite CACHE to ALTER TABLE
Unit tests for unified views
Slightly nicer parsing of CACHE in SharkDriver.