Renamed src package to sebimachine.

- Gave the package a descriptive name.
- Passed over with black once more.
- Created setup.py to install dependencies.
- Updated author to reflect repo ownership to Dusty.
- Changed `git` command to use the __url__ attribute.
- Changed music to use ogg vorbis instead of mp3, purely for
    performance.
- Tried to make sure nothing broke.
- Updated dockerfile. Pretty sure we don't need it though...

sebimachine/cogs/utils/__init__.py

@@ -0,0 +1 @@
+

sebimachine/cogs/utils/noblock.py

@@ -0,0 +1,15 @@
+#!/usr/bin/env python3.6
+# -*- coding: utf-8 -*-
+import asyncio
+import functools
+
+
+def no_block(func):
+    """Turns a blocking function into a non-blocking coroutine function."""
+
+    @functools.wraps(func)
+    async def no_blocking_handler(*args, **kwargs):
+        partial = functools.partial(func, *args, **kwargs)
+        return await asyncio.get_event_loop().run_in_executor(None, partial)
+
+    return no_blocking_handler