apache/spark — pull request #2576 by scwf (2014-09-29 14:24:30+00:00)
Title: [SPARK-3720][SQL]initial support ORC  in spark sql

Provide a initial support for orc in spark sql, support for both reading and writing ORC files . user can use ORC file just like parquet as follow:
```
... ...
rdd.registerTempTable("records")
rdd.saveAsOrcFile("pair.orc")
val orcFile = sqlContext.orcFile("pair.orc")
orcFile.registerTempTable("orcFile")
sql("SELECT * FROM orcFile").collect().foreach(println)
```