Minor changes in RemoteExecutor.java and LocalExecutor.java. Removed obsolete null-value check in the finally clauses in LocalExecutor.java. Returning proper exit code in RemoteExecutor.java.

Added word count example using the counting of group elements.

Relocation of constructTestPath and constructTestURI methods to Path

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).

 - DataStream to DataSet
 - DataSourceFormat -> *InputFormat
 - DataSinkFormat -> *OutputFormat

Clean up imports in scala examples

TaskManagers in one JVM. The datatransfer happens over the OS network stack, not
through memory channels

[ci skip]

Also add checks in key selector extraction to check whether the selected
fields can actually be part of a key.

[ci skip]

Fixes #242. Excludes nephele-examples, pact-examples, and pact-scala-examples from distribution lib folder

- use "build" profile of maven, to avoid any download progress information
- Reduce logging verbosity of javadoc-plugin
- instruct maven-eclipse-plugin to download sources (so that users can debug through our code without actively downloading the code)
- Remove warnings in eclipse from the new git-commit-id maven plugin

This helps when implementing custom scala data input formats.

Failure to start web info server does not terminate job manager.

Cleaned parsers and reworked double parser to go through Java's parsing logic (which is object heavy, but precise) until we have a precise parser.