stratosphere/stratosphere — pull request #617 by fhueske (2014-03-20 13:28:36+00:00)
Title: Add project operator to new Java API

Adds a project operator to the new Java API (Issue #566)
Project works only on Tuple datasets and is used like:

```
DataSet> ds = ...
DataSet> pds = ds.project(2,0).types(String.class, Integer.class);
DataSet> pds2 = ds.project("FTF").types(Double.class);
DataSet> pds3 = ds.project(true, false, true).types(Integer.class, String.class);
```

Also added unit tests and integration tests for the project operator.