- removed some unneeded tutorial files

- use -name test before -type test to avoid calling stat(2) on every file.
- use -delete instead of -exec rm to avoid forking

- collects the log information only, without running any cases.
  This can be useful if the user has terminated the test prematurely
  but nonetheless wishes to summarize the log output.

Patch provided by Bruno Santos
Resolves patch application request http://www.openfoam.org/mantisbt/view.php?id=2015

foamRunTutorials now accepts two arguments:
-test : Preferentially execute Alltest, if present, over Allrun.
-skipFirst : Skip Alltest/Allrun at the top level to prevent recursion

Added because some tutorials are not dependent on controlDict and take
a long time.

This reverts commit c5bea524.

This reverts commit 2e1e671d.

present.

Tried to sort out the scripts in the tutorials but found it is messed up.  Will start again from a new version from Mattijs