Shows error if glslangValidator not found. Also made script to download it

setup.py

@@ -0,0 +1,33 @@
+import urllib.request
+import zipfile
+from io import BytesIO
+import shutil
+import os as o
+
+os = {
+    0: 'win',
+    1: 'linux',
+    2: 'osx'
+}
+
+url = {
+    0: 'https://github.com/KhronosGroup/glslang/releases/download/master-tot/glslang-master-windows-x64-Release.zip',
+    1: 'https://github.com/KhronosGroup/glslang/releases/download/master-tot/glslang-master-linux-Release.zip',
+    2: 'https://github.com/KhronosGroup/glslang/releases/download/master-tot/glslang-master-osx-Release.zip'
+}
+
+def main():
+    os_choice = int(input('Choose your OS:\n - 0: Windows\n - 1: Linux\n - 2: OSX\n> '))
+    if os_choice not in os:
+        print('Invalid OS. Please only choose a value between 0 and 2')
+
+    with urllib.request.urlopen(url[os_choice]) as respone:
+        with BytesIO(respone.read()) as zipped:
+            with zipfile.ZipFile(zipped) as zip_file:
+                zip_file.extract('bin/glslangValidator')
+                o.rename('bin/glslangValidator', 'glslangValidator')
+                o.rmdir('bin')
+                print('glslangValidator downloaded. Set mclglsl')
+                return
+    print('There was an error :(')
+main()