add explicit to CRSMatrix constructors
activate non-const operator [] in the dense vector class
mv
- move VectorAssembler
- pass mapping table instead of DataArrangement class
mv MeshItemWiseTask dir
- getDataID() return -1 if no matching
- add getComponentIDs(), getDataIDList()
renamed
changed to template member functions
add more tests for DataArrangement
add DistributionManager for serial
add tests for serial