More test.

* tests/run: Correct summary generation. Always print the failed test
  summary.
* tests/ls.test, tests/head.test, tests/cat.test: More test.
cat: Fix some test.

* src/dctc/java/com/dataiku/dctc/command/cat/CatAlgorithmFactory.java,
  src/dctc/java/com/dataiku/dctc/command/cat/PrettyBytesCatAlgorithm.java,
  src/dctc/java/com/dataiku/dctc/command/cat/PrettyBytesCatPrinter.java:
  Don't use an algorithm for pretty character. Fix it, and clean.

* src/dctc/java/com/dataiku/dctc/command/cat/LeftLinumCatHeader.java:
  Display a tabulation between the number of the line and the line.
test: Correct the diff.

* tests/utils: Was interverted.
test: Print a summary before the summary generation.

* tests/run: Here.
Don't put || true in the expected output.

* tests/cat.test: Here, put it in the sub-shell.
More test.

* tests/cat.test, tests/ls.test: Here.