Update docs

BUILD.md

@@ -43,7 +43,7 @@ The build script will automatically handle obtaining dependencies and making the
 
 ### foobar2000 plugin (foo\_input\_vgmstream)
 Requires MSVC (foobar/SDK only links to MSVC C++ DLLs) and these dependencies:
-- foobar2000 SDK, in *(vgmstream)/dependencies/foobar/*: http://www.foobar2000.org/SDK
+- foobar2000 SDK (2018), in *(vgmstream)/dependencies/foobar/*: http://www.foobar2000.org/SDK
 - FDK-AAC, in *(vgmstream)/dependencies/fdk-aac/*: https://github.com/kode54/fdk-aac
 - QAAC, in *(vgmstream)/dependencies/qaac/*: https://github.com/kode54/qaac
 - WTL (if needed), in *(vgmstream)/dependencies/WTL/*: http://wtl.sourceforge.net/
@@ -104,7 +104,7 @@ git clean -fd
 # vgmstream123 player
 Should be buildable with Autotools, much like the Audacious plugin, though requires libao (libao-dev).
 
-Windows builds aren't supported at the moment (source may need to be adapted for non-POSIX systems).
+Windows builds are possible with libao.dll and includes, but some features are disabled.
 
 
 ## Development

README.md

@@ -151,6 +151,7 @@ a companion file:
 - .adx: .adxkey (derived 6 byte key, in start/mult/add format)
 - .ahx: .ahxkey (derived 6 byte key, in start/mult/add format)
 - .hca: .hcakey (8 byte decryption key, a 64-bit number)
+- .fsb: .fsbkey (decryption key, in hex)
 
 The key file can be ".(ext)key" (for the whole folder), or "(name).(ext)key"
 (for a single file). The format is made up to suit vgmstream.
@@ -471,7 +472,8 @@ This list is not complete and many other files are supported.
 - other:
 	- .adxkey (decryption key for .adx, in start/mult/add format)
 	- .ahxkey (decryption key for .ahx, in start/mult/add format)
-	- .hcakey (decryption key for .hca, in HCA Decoder format)
+    - .hcakey (decryption key for .hca, in HCA Decoder format)
+    - .fsbkey (decryption key for .fsb, in hex)
 	- .vgmstream + .pos (FFmpeg formats + loop assist)
 
 Enjoy! *hcs*