Created Compiling on Windows (markdown)

Compiling-on-Windows.md

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+## Set up MSYS2, following [this guide](https://github.com/orlp/dev-on-windows/wiki/Installing-GCC--&-MSYS2).
+
+## Install dependencies
+```
+pacman -S mingw-w64-i686-glew mingw-w64-x86_64-glew mingw-w64-i686-SDL2 mingw-w64-x86_64-SDL2 python3
+```
+## Copy baserom(s) for asset extraction
+
+For each version (jp/us/eu) that you want to build an executable for, put an existing ROM at
+`./baserom.<version>.z64` for asset extraction.
+
+## On MSYS2, navigate to the sm64pc folder and then enter `./tools/audiofile-0.3.6/`. Inside this directory, run
+```
+autoreconf -i
+```
+
+Only leave this directory on step 9.
+
+## Run the `configure` script
+```
+PATH=/mingw64/bin:/mingw32/bin:$PATH LIBS=-lstdc++ ./configure --disable-docs
+```
+## Run the `make` script
+```
+PATH=/mingw64/bin:/mingw32/bin:$PATH make
+```
+## Create a lib directory in `tools/`
+```
+mkdir ../lib
+```
+
+## Copy the compiled libaudiofile to `tools/lib/`
+```
+cp libaudiofile/.libs/libaudiofile.a ../lib/
+cp libaudiofile/.libs/libaudiofile.la ../lib/
+```
+
+## Navigate back to `tools/`, then alter the `Makefile` and add `-lstdc++` on the following line
+```
+tabledesign_CFLAGS := -Wno-uninitialized -laudiofile -lstdc++
+```
+
+## Run `make`
+```
+PATH=/mingw64/bin:/mingw32/bin:$PATH make
+```
+
+## Navigate back to the sm64pc root directory.
+
+## Finally, run `make` once more. 
+
+(Note that mingw32 and mingw64 have been swapped. This is so you can build the 32bit application successfully.)
+
+```
+PATH=/mingw32/bin:/mingw64/bin:$PATH make
+```