decision_points: Create separate projects for MAVO

 * Add support for decision points into the MAVO metamodel
decision_points: Migrate to separate MAVO project (1)

 * edu.toronto.cs.se.mmint
 * edu.toronto.cs.se.mmint.mavo
decision_points: Migrate to separate MAVO project (2)

 * edu.toronto.cs.se.mmint.edit
 * edu.toronto.cs.se.mmint.editor
decision_points: Migrate to separate MAVO project (3)

 * Core-Types projects (except for Ecore)
 * EMFtoCSP projects
 * Z3 projects
 * Kleisli projects
decision_points: Migrate to separate MAVO project (4)

 * ClassDiagram projects (except for diagram)
decision_points: Migrate to separate MAVO project (5)

 * Graph projects (except for diagram)
decision_points: Migrate to separate MAVO project (6)

 * IStar projects (except for diagram)
decision_points: Migrate to separate MAVO project (7)

 * RelationalDatabase projects (except for diagram)
decision_points: Migrate to separate MAVO project (8)

 * All remaining projects but diagrams
decision_points: Add MAVO projects to MMINT feature
decision_points: Add description to decision elements in mavo metamodel
decision_points: Regen MID diagram

 * Add opposite reference from mavo elements to mavo alternatives
 * Regen mid diagram and fix problems
decision_points: Regen Relationship diagram
decision_points: Regen ClassDiagram_MAVO and diagram
decision_points: Fix problems with MID diagram regen

 * Use customized view provider
 * Fix operators that refer to old mavo uri
 * Remove unnecessary imports
decision_points: Regen Graph_MAVO
decision_points: Regen IStar_MAVO
decision_points: Regen RelationalDatabase_MAVO
decision_points: Fix instance models with regen changes
decision_points: Remove unnecessary gmf diagram properties