Allow for global PHP_BIN

Allows for a global PHP_BIN to be defined instead of checking for a
valid location.
Fix for cpu-z check

For some reason windows 8.1 does not like single quotes so replacing the
single quote run of cpu-z with double quotes.
Merge pull request #7 from AlphaCluster/windows-cleanup

Windows cleanup
pts-core: Windows 8.1 support improvements
pts-core: Add SKIP_TESTING_SUBSYSTEMS environment variable, partially based on former ONLY_TEST_TYPES
pts-core: Some minor fixes
pts-core: Add a run-random-tests command to run random tests/workloads on the system
pts-core: Few fixes to run-random-tests
pts-core: Fix typo from previous commit
pts-core: Another run-random-tests change
pts-core: MOre run-random-tests changes
pts-core: More work
pts-core: Use batch mode in run-random-tests
pts-core: Change for previous commit
pts-core: Doh typo
pts-core: Improve some text formatting
pts-core: Few more run-random-tests tweaks
pts-core: More run-random-tests work
pts-core: Adjust string
pts-core: Support for showing most popular OpenBenchmarking.org results to be benchmarked in run-random-tests