incorrect use of apostrophes in PAPI

Issue

• Note CPU's should be CPUs in both these entries from PAPI output:

Hdw Threads per core     : 1
Cores per Socket         : 8
NUMA Nodes               : 2
CPU's per Node           : 16
Total CPU's              : 32
Number Hardware Counters : 11
Max Multiplex Counters   : 64

• A couple URL that describe the plural of CPU is CPUs:
  • http://en.wiktionary.org/wiki/CPU
  • http://gernot-heiser.org/style-guide.html