Debug - Expire Cas ProxyTicket when attempting to get a PGT
adding local distributionManagement to pom.xml
Issue #19 : Enhancement to upload an existing file

This PR add the possibility to configure the portlet behaviour when
uploading an existing file by adding a portlet preference property. It's
a first step before developping an UI to let the choice of the user when
the problem appear. This PR is more a first step but let the possibility
to define a default behaviour for this problem, as the default
configuration override all existing files (expect in sardine
implementation).

So next steps are/could be :
- The method putFile for the cmisService must be modified to work
 with this enhancement.
- Give the possibility to a user to change his default behaviour by
  editing portlet preferences.
- wait or implements the UI evolution, referenced here :
  https://github.com/Valums-File-Uploader/file-uploader/issues/40
Don't get "IMAGINARY" files type

Imaginary files are files that does not exist, so it's useless to show
them, see http://commons.apache.org/proper/commons-vfs/apidocs/org/apache/commons/vfs2/FileType.html#IMAGINARY
for more details on this file type.

In my case it correspond to broken symbolic links.

An other way to do would be to set these files as hidden, but we should
find an icon to associate.
[maven-release-plugin] prepare release esup-filemanager-3.0.0-esco-1
[maven-release-plugin] prepare for next development iteration
resout problème génération jar packages classes
adding local distributionManagement to pom.xml
[maven-release-plugin] prepare release esup-filemanager-3.0.0-esco-1
correction bug version war-plugin to generate classes package
Re-enabling the thumbnail Mode support

I don't know why the support wasn't done on this feature when the
portlet moved to portlet 2.0 full support as it was only few codes
change from the old implementation. But now it should works again.

Conflicts:

	src/main/java/org/esupportail/portlet/filemanager/portlet/PortletControllerAjax.java
[maven-release-plugin] prepare release esup-filemanager-3.0.0-esco-2
[maven-release-plugin] prepare for next development iteration
[maven-release-plugin] prepare release esup-filemanager-3.0.0-esco-3