Small fixes (check description)

- Replaced requirements.txt with Pipfile so that it works with pipenv
- Moved and renamed the main python file to fit the original project layout

Author: slushiegoose

Pipfile

@@ -7,9 +7,10 @@ verify_ssl = true
 flake8 = "*"
 
 [packages]
+asynctk = "==0.0.8a0"
 
 [requires]
 python_version = "3.7"
 
 [scripts]
-lint = "python -m flake8"
+lint = "python -m flake8"

Pipfile.lock

@@ -0,0 +1,8 @@
+import asynctk as tk
+import asyncio
+
+root = tk.AsyncTk()
+async def save():
+    print('test')
+root.protocol("WM_DELETE_WINDOW", lambda: asyncio.ensure_future(save()))
+root.mainloop()