Adding new performance counters for counting the number of invocations and getting the overall time executing various AGAS cache functions.
corrected num_os_threads in printout for distributed stencil examples
Fixing compilation issues
fixed number of OS threads reported stencil
Merge branch 'agas_cache_perf_counters' of https://github.com/STEllAR-GROUP/hpx into agas_cache_perf_counters
Merge pull request #1219 from STEllAR-GROUP/agas_cache_perf_counters

Adding new AGAS cache performance counters
stencil examples added number of localities to printout
stencil print out missing comma