winemac: Fix a memory leak if posting WM_DROPFILES fails.
winemac: Add the ability to disable high-resolution scrolling.

The Mac driver can generate scroll wheel events with values which are not integral
multiples of WHEEL_DELTA.  Apps should handle that by scrolling a corresponding
non-integral multiple of what they'd do for a WHEEL_DELTA-valued scroll or, if
they can't, then at least accumulate scroll distance until its magnitude exceeds
WHEEL_DELTA and do a "chunky" scroll.  However, many apps don't do that properly.
They may scroll way too far/fast or even in the opposite direction.

If the registry setting UsePreciseScrolling is set to "n", the Mac driver will do
that accumulation and chunking itself to work around such broken app behavior.
msxml3: Remove no longer used helper.
d2d1: Get rid of "optional" attributes.
d2d1: Add the ID2D1BitmapBrush interface.
d2d1: Add the ID2D1SolidColorBrush interface.
d2d1: Add the ID2D1GradientStopCollection interface.
d2d1: Add the ID2D1LinearGradientBrush interface.
shell32/tests: Fix the tests when run from the top directory.
shell32/tests: Fix tests on win 8.
oleacc: Add message context for object state string resources.
include: Add missing proxy definitions.
jsproxy: New dll.
jsproxy: Implement InternetInitializeAutoProxyDll and InternetDeinitializeAutoProxyDll.
jsproxy: Implement InternetGetProxyInfo.
winhttp: Reimplement WinHttpGetProxyForUrl on top of jsproxy.
winhttp: Add support for retrieving the proxy automatic configuration URL on Mac OS X.
advpack: Remove unnecessary DllMain implementation.
dciman32: Remove unnecessary DllMain implementation.
msimg32: Remove unnecessary DllMain implementation.