WINBUILD: Delete stale project files
WINBUILD: Create new BOINC w/VirtualBox project files, update to VirtualBox 4.2.16
LIB: Provide a mechanism for BOINC client software to initialize the exception filter for secondary threads
client: Initialize diagnostics framework for the power management and proxy detection threads on Windows
client: Initialize diagnostics framework for the sub-second CPU throttler.
client: Add vm_extensions_disabled as an element to APP_INIT_DAATA.  We can use the additional information to selectively enable/disable hardware acceleration in VirtualBox.
VBOX: Enable the use of hardware acceleration on single core machines.

This requires BOINC 7.2.18 or better and for BOINC to have not have detected VM extensions being disabled in the BIOS.

T4T has stopped handing out multi-core work.  Disabling the use of hardware extensions on a machine that supports them might be leading to performance problems for other VMs running on the same machine.
client: fix build break on Mac