add command line option -mpqc3 to pt2r12 program, it's used to control if use MPQC3 new feature, the default is false.
MPQC3 new feature in pt2r12 only works if MPQC is compiled with TA
change -mpqc3 command line option only available for MPQC3, and the default value is true
Merge pull request #15 from pchong90/master

command line option -mpqc3 in pt2r12 program