add -t option for collecting call path traces. delete obsolete code that was commented out. adjust documentaton 	hpcrun vs. csprof 	papi_avail
add -t option for collecting call path traces.
delete obsolete code that was commented out.
adjust documentaton
	hpcrun vs. csprof
	papi_avail

zcth428/hpctoolkit111,zcth428/hpctoolkit111,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,zcth428/hpctoolkit111,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,HPCToolkit/hpctoolkit,zcth428/hpctoolkit,zcth428/hpctoolkit,zcth428/hpctoolkit111,zcth428/hpctoolkit,zcth428/hpctoolkit111,zcth428/hpctoolkit,zcth428/hpctoolkit