Merge pull request #2 from fanf/bug_3267/update_plugin_to_scala_2_10_libraries

Fixes #3267: update to Rudder 2.6.0, Lift 2.5-M1, and clear spaces
Fixes #3268: Created a README file for the Hello World plugin repo
Merge pull request #3 from Kegeruneku/bug_3268/dev/3268_readme_for_the_helloworld_plugin

Fixes #3268: Created a README file for the Hello World plugin repo
Merge branch 'branches/rudder/2.3' into branches/rudder/2.4
Merge branch 'branches/rudder/2.4' into branches/rudder/2.5
Merge branch 'branches/rudder/2.5'
Ref #3270 Fixes 3272 Remove Spring IoC when easy