JBIDE-13321 : Prevent NPE in ProjectUtil.refreshHierarchy

Signed-off-by: Fred Bricon <fbricon@gmail.com>
Temporarily copied m2e 1.3 areEqual(Archetype, Archetype) method 

we need to ensure archetype with different versions are properly
handled, i.e. detected as different.

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13339 : instanciate a Stacks in all circumstances

Signed-off-by: Fred Bricon <fbricon@gmail.com>
Fix typo

(in reality, I'm testing egit line ending screw-ups)

Signed-off-by: Fred Bricon <fbricon@gmail.com>
13358 : Bump central plugins version to 1.2.0.x

Signed-off-by: Fred Bricon <fbricon@gmail.com>
13359 : Bump project-example plugins version to 1.5.0.x

Signed-off-by: Fred Bricon <fbricon@gmail.com>
13357 : Bump maven plugins version to 1.5.0.x

Signed-off-by: Fred Bricon <fbricon@gmail.com>
JBIDE-13342 - kitchensink-html5-mobile - Readme isn't shown when importing for first time with empty local repository