PLF-6019 : Fix dev mode for windows

IF doesn't support to have several SET commands (details : http://stackoverflow.com/a/14190037)
PLF-6020 : Don't use "SETLOCAL EnableDelayedExpansion" like introduced to fix PLF-6019. With it CATALINA_OPTS isn't used/visible by Tomcat :(
PLF-5898 : bundle the add-ons manager 1.0.0
PLF-6040: Upgrade instructions for Platform 4.1.0-RC1
PLF-6047 update dependencies to release version of PLF 4.1.0-RC1
[maven-release-plugin] prepare release 4.1.0-RC1
[maven-release-plugin] prepare for next development iteration
PLF-6047 update dependencies to development version of PLF 4.1.x
Merge remote-tracking branch 'origin/release/4.1.0-RC1'
SWF-2628 : Create stabilization branch and update projects versions

Signed-off-by: Arnaud Héritier <aheritier@exoplatform.com>