Added code for tracking the website traffic w/ piwik
Some ITTB programs updated to v1.1

- alternativesRankingViaQualificationDistillation
- plotAlternativesComparisons
- plotAlternativesValues
- plotAlternativesValuesPreorder
- plotCriteriaValues
- plotCriteriaValuesPreorder
- plotNumericPerformanceTable
dos2unix on xml descriptions
ITTB: plotValueFunctions v1.1
diviz v1.12