Implementation of `cmp' command.

* src/dctc/java/com/dataiku/dctc/command/Cmp.java: Here.
* src/dctc/java/com/dataiku/dctc/Main.java: Add cmp to the command
  list.
fix sed syntax to work with Mac OS X built-in sed
rename: name -> pattern.

* src/dctc/java/com/dataiku/dctc/command/Find.java: Here.
fix the CatTest so that the buld stops complaining about failed tests
fix code coverage complaints of IntelliJ:
  * use native Arrays.asList instead of manual iterator
Merge remote-tracking branch 'remotes/rluta/master'
Move test file to the right location.

* src/dctc/java/com/dataiku/dctc/test/Settings.java,
  src/dctc/java/com/dataiku/dctc/test/command/CatTest.java,
  src/dctc/java/com/dataiku/dctc/test/command/CpTest.java: From here...
* src/dctc/test/com/dataiku/dctc/Settings.java,
  src/dctc/test/com/dataiku/dctc/command/CatTest.java,
  src/dctc/test/com/dataiku/dctc/command/CpTest.java: To here.
No short option for the commands.

* src/dctc/java/com/dataiku/dctc/command/Command.java: Here.
* src/dctc/test/com/dataiku/dctc/command/CatTest.java: Adjust the
  test.