Removed std::map from IQTDat. Replaced storage by a std::vector.
Some cleanup and renaming of IQTensor methods.
Fixed unittest/localmpo_test to compile.
Changed IQTDat into a template class so it could be used as storage for IQTSparse. Removed IQTSDat which was a duplicate of older IQTDat class.
Added ROADMAP to version control.