StatisticalMap -> StatisticMap
StatisticMap with statisticType attribute
Statistical Map -> Statistic Map

Update URIs and labels
Update serialisations
Merge pull request #80 from cmaumet/StatisticMap

Merge: StatisticMap and statisticType attribute instead of (T|F|Z)StatisticMap [ following the Hackathon ]
fix: Remove "Level" in "xxxLevelStatistic"