APBS solvation energy example
&cntrl
   maxcyc=0, imin=1,
   cut=12.0,
   igb=6, ntb=0,
   ntpr=1,
 /
&apbs
    apbs_debug=0,
    apbs_print=1,
    grid=0.5, 0.5, 0.5,
    calc_type=1,
    cmeth=1,
 bcfl=2,
 srfm=1,
 chgm=1,
 pdie=1.0,
 sdie=78.54,
 srad = 1.4,
 radiopt=3, pqr='2ala.pqr',
 calcforce=0, calcnpenergy=1,
 wpot=1, wchg=1, wkappa=1, wdiel=1,
&end
