Attempting to run http://spark.apache.org/docs/latest/quick-start.html#a-standalone-app-in-scala from source.
This line:
You should import the implicit conversions from SparkContext:
SparkContext
import org.apache.spark.SparkContext._
They use the 'pimp up my library' pattern to add methods to RDD's of specific types. If curious, see SparkContext:1296