Improvements in generated code and NEConnection class
Merge branch 'master' of https://github.com/neo4emf/Neo4EMF

Conflict resolution.

Conflicts:
	.gitignore
	fr.inria.atlanmod.neo4emf.tests/.classpath
	fr.inria.atlanmod.neo4emf.tests/pom.xml
	fr.inria.atlanmod.neo4emf.tests/src/test/java/fr/inria/atlanmod/neo4emf/impl/tests/Neo4emfResourceTest.java
	models/mgraph/pom.xml
	models/mteach/target/MTeach-1.0.jar
	models/mteach/target/maven-archiver/pom.properties
	models/mteach/target/maven-status/maven-compiler-plugin/compile/default-compile/inputFiles.lst
	models/testdata-project/META-INF/MANIFEST.MF
	models/testdata-project/src/main/java/fr/inria/atlanmod/neo4emf/testdata/impl/LinkVertexImpl.java
	models/testdata-project/src/main/java/fr/inria/atlanmod/neo4emf/testdata/impl/VertexImpl.java
	models/testdata-project/target/maven-archiver/pom.properties