[ANN] ClearCasePlugin 1.24 available for Aurora only

* Fix NPE in automatic checkout of readonly file on edit

Fix NPE in excluding deleted file

Fix inconsistent action/menu names

Fix move/rename/delete/add not using the current check in comment

Fix adding directory in the CommandLine implementation (use now mkdir instead of mkelem all the time)

I had some race-condition with the NewCommandLineClearcase implementation so I am pulling it out until I can fix it