Use a PDBQT file to build a minimum internal structure representation (list of atoms), including AutoDock atom types (stored as Atom.type) and partial charges (Atom.charge).
Reads a PDBQT file line by line and is not fuzzy about numbering.
This does not support multi-model PDBQT files (yet!)
Warning
Only cares for atoms and their names; connectivity is not deduced. Masses are guessed and set to 0 if unknown.