Move stuff to vendor

vendor/openal-soft/readme.txt

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+OpenAL Soft Binary Distribution
+
+These binaries are provided as a convenience. Users and developers may use it
+so they can use OpenAL Soft without having to build it from source.
+
+Note that it is still expected to install the OpenAL redistributable provided
+by Creative Labs (at http://openal.org/), as that will provide the "router"
+OpenAL32.dll that applications talk to, and may provide extra drivers for the
+user's system. The DLLs provided here will simply add additional devices for
+applications to select from. If you do not wish to use the redistributable,
+then rename soft_oal.dll to OpenAL32.dll (note: even the 64-bit DLL should be
+named OpenAL32.dll). Just be aware this will prevent other system-installed
+OpenAL implementations from working.
+
+To use the 32-bit DLL, copy it from the bin\Win32 folder to the folder that
+the 32-bit OpenAL32.dll router is installed in.
+For 32-bit Windows, the Win32 DLL will typically go into the system32 folder.
+For 64-bit Windows, the Win32 DLL will typically go into the SysWOW64 folder.
+
+To use the 64-bit DLL, copy it from the bin\Win64 folder to the folder that
+the 64-bit OpenAL32.dll router is installed in.
+For 64-bit Windows, this will typically be the system32 folder.
+
+The included openal-info32.exe and openal-info64.exe programs can be used to
+tell if the OpenAL Soft DLL is being detected. It should be run from a command
+shell, as the program will exit as soon as it's done printing information.
+
+A configuration GUI app is provided in the alsoft-config folder. It is a front-
+end to editing %AppData%\alsoft.ini, which can be used to modify certain
+behaviors for OpenAL Soft devices.
+
+Have fun!