Add a field for non-explicit hydrogens in adjlist in the molecule search.

Using old, nonsaturated adjlists, obtain the drawing and thermo info
for the saturated compound.
Add links to molecule info from thermo entry and molecule search pages.
Add text adjlist to the molecule search page (in addition to adjlist field.)

For converting between non-explicit hydrogen adjlist to explcit hydrogen adjlist,
having additional adjlist can be helpful (though also found in external link molecule
info page, but this way people don't have to look further.)