Select data type interpretation based on hdf5 type metadata

Presently, data types for vectors are presumed to be float[][], however, this is not always the case. When the type is wrong for the actual data in the hdf5 file, the hdvectors will still run, but it will interpret the data incorrectly and give incorrect results.

The data type should not be implied, and all interpetation of data types should be controlled directly from the provided type metadata.