Reducing jmol output

Adding set/isVerbose methods to JmolPanel and MyJmolStatusListener
to control verbosity (quiet by default)
Fixing compilation bug.

I had been building against the 1.7 JDK, but the POM specifies 1.6.
Thus JComboBox should not be generic.
Merge pull request #98 from sbliven/master

Reducing jmol output

(Fixed prior compilation bug)