Error parsing UVL models from FeatureIDE

[jmhorcas]

Converting a FeatureIDE (.xml) file to UVL (.uvl) using FeatureIDE and then reading it with the the UVL parser raises some errors related with "\t\t" and "EOF" stuff.
I've tried with some models (including the linux one).
I think that the new parser does not allow empty lines throught the model. Not sure if any other errors.