Added more comments in relation to -mqh
Added more comments in relation to -mqh

-mqh and -mqa are working. Thought I should double check because
15ce9cec129b7ce78e3c3535faa5305e8b559af3 showed that -jqh and -jqh weren't
working.

MacroModel by default sets aliphatic hydrogen charges to zero. I have never seen
a situation otherwise. However, should such a case arise, I added some comments
and some commented out code to help the user figure out what to do.

arosale4/q2mm,arosale4/q2mm,Q2MM/q2mm,ericchansen/q2mm,ericchansen/q2mm,Q2MM/q2mm