clean: Pretty display.

* src/dctc/java/com/dataiku/dctc/display/NCursesDisplay.java: Cut the
  string if too long. Align the file name.
clean: Update style.
Privatize an attribute,and make it static final.

* src/dctc/java/com/dataiku/dctc/display/Size.java: Don't rebuild
  constant string.
Privatize the display hierarchy.

* src/dctc/java/com/dataiku/dctc/display/EmptyDisplay.java,
  src/dctc/java/com/dataiku/dctc/display/LessSimpleDisplay.java,
  src/dctc/java/com/dataiku/dctc/display/ListDisplay.java,
  src/dctc/java/com/dataiku/dctc/display/NCursesDisplay.java,
  src/dctc/java/com/dataiku/dctc/display/SimpleDisplay.java: No needs
  to show it, only the factory needs it.
warn: Delete fallthrough warnings.

* src/core/java/com/dataiku/dip/partitioning/TimeDimensionValue.java:
  Use the fallthrough to factorize, not a problem.
packager: Return the right error.

* packager/create-dctc-selfextracting.sh: Add the forgotten escaped
  variable.
clean: Rewrite listFilesCommand.

* src/dctc/java/com/dataiku/dctc/command/abs/ListFilesCommand.java:
  Make it clearer.
* src/dctc/java/com/dataiku/dctc/command/Cp.java,
  src/dctc/java/com/dataiku/dctc/command/Dispatch.java,
  src/dctc/java/com/dataiku/dctc/command/Mv.java: Adjust.
* src/dctc/java/com/dataiku/dctc/command/abs/Command.java: Add more
  error helpers
* src/dctc/java/com/dataiku/dctc/file/FileManipulation.java: If son ==
  parent return an empty string. Hack needed for ListFileCommand.
display: Complete getters/setters in the factory.

* src/dctc/java/com/dataiku/dctc/display/DisplayFactory.java: Here.