Fix #75 Redefine UML viewpoints

Available viewpoints are :
Capture : To capture the actors and their interactions with the application and define the main structure of the application.
Design : To work on the fine grained structure and the behaviours of the application.
Review : To document, get some overview and metrics of the application.
Extend : To extend the UML standard for example by defining profile.
Merge profile.odesign in uml2.odesign

Integrate the profile diagram description to the main uml
specification description and delete the org.obeonetwork.dsl.uml2.profile.design
project and the associated testing project.
Change visibility of dashboard services to reuse it in sysml designer
Fix add existing elements tool
Fix get mappings method by replacing isSynchronizationLock by isCreateElements
Update splashscreen to 4.0
Fix #456 migration menu

A new right-click menu "Migrate to UML Designer 4.0" is available
on Projects. This menu convert the current project to a modeling
project, activate the new viewpoints available in UML Designer 4.0,
and migrate the existing representations.