Add JSON load code to wt.exe on Windows.
Windows Fixes

- Only test_compact.py, and test_backup03.py fail have the only unknown failures
Port all examples, most tests, and wtperf to Windows

Added windows_shim to emulate most functions
Merge pull request #1286 from markbenvenuto/win_fixes

Windows Fixes
Merge pull request #1287 from markbenvenuto/windows_test_fixes

Port all examples, most tests, and wtperf to Windows
Fix build warnings from wtperf.
Fix backward ifdef.