Transformacion de variables Features y Attributes
Merge remote-tracking branch 'origin/HEAD' into HEAD

Conflicts:
	TVLToPrologTransformer/src/co/edu/eafit/tvl/expression/GNUPrologTimesExpression.java
	TVLToPrologTransformer/src/co/edu/eafit/tvl/expression/GNUPrologTransformer.java
	TVLToPrologTransformer/src/co/edu/eafit/tvl/expression/GNUPrologXorAggExpression.java
	TVLToPrologTransformer/test/co/edu/eafit/tvl/TVLTransformerExpressionToGNUPrologTest.java
ExpressionTranformer
RealExpression restriction
Segments builders
Full Transformation