Molecule dump

[RayHackett]

• Added dump method to molecule and atom (incl. the element symbol)
• Removed END line from Template dump (because there should only be one END per PDB file)
• Fixed dump method of hits to include the element.
• Fixed how chainID1 and chainID2 are handled when an Atom is initialized from a cif file.
• Fixed the right padding of element in Atom class.

I think I am happy now :) So as far as I am concerned these can be a new release?