Add link to starter jobs

[ci skip]
LocalDistributedExecutor: Execute Nephele in CLUSTER-mode mode, with multiple
TaskManagers in one JVM. The datatransfer happens over the OS network stack, not
through memory channels
Rename multiple Scala classes:
 - DataStream to DataSet
 - DataSourceFormat -> *InputFormat
 - DataSinkFormat -> *OutputFormat

Clean up imports in scala examples
Manually configured JAVA_HOME is preferred over system configuration. No default JAVA_HOME is used. Instead an error message is shown. Adresses #207
Added use of default java command as third option (after stratosphere-conf.yaml and JAVA_HOME).
PactProgram and PlanWithJar create proper user code class loaders.
Resolve issue with hardcoded "file://" URIs under windows
Relocation of constructTestPath and constructTestURI methods to Path
Fixed check for local file scheme in TestBase2.