Added doc/packaging.md

doc/packaging.md

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+# Packaging
+LoveDOS provides a built-in mechanism for packaging your game into an exe for
+distribution. Simply pass `--pack` as the first argument to LoveDOS followed by
+the your game's directory and the name of the output exe file.
+
+For example, to package the game in the directory `mygame` to an exe file named
+`mygame.exe`, you would run the following:
+```batch
+love --pack mygame mygame.exe
+```
+
+This would result in the file `mygame.exe` -- *Make sure to include the `.exe`
+at the end of the name so LoveDOS knows to pack the project into an executable.*
+
+You should also include `cwsdpmi.exe` with your game when distributing.