Merge branch 'stable-4.0'

* stable-4.0:
  Prepare post 4.0.0-rc1 builds
  EGit Mylyn Github Connector v4.0.0.201505191015-rc1

Change-Id: Ie7cac63dc419692738fa7e450d9aee3196286ee9
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>