Added a skeleton class for the main entrypoint

Github/main.py

@@ -1,6 +1,15 @@
 #== main.py ==#
 
-import aiohttp
-import asyncio
+__all__ = (
+    'Github',
+)
 
-from . import http
+import aiohttp
+
+from . import http
+
+class Github:
+    async def start(self):
+        """Main entry point to the wrapper, this creates the ClientSession."""
+        headers = {}
+        self._session = http.make_session(headers=headers)