Merge remote-tracking branch 'origin/develop' into Sergio

# Conflicts:
#	sdg-core/src/main/java/es/upv/mist/slicing/graphs/ClassGraph.java
#	sdg-core/src/main/java/es/upv/mist/slicing/nodes/VariableVisitor.java
#	sdg-core/src/main/java/es/upv/mist/slicing/utils/ASTUtils.java