First partially working version of ASGI-powered Datasette #272

Lots still to do:

* Static files are not being served
* Streaming CSV files don't work
* Tests all fail
* Some URLs (e.g. the 'next' link on tables) are incorrect

But... the server does start up and you can browse databases/tables

setup.py

@@ -37,7 +37,7 @@ setup(
     author="Simon Willison",
     license="Apache License, Version 2.0",
     url="https://github.com/simonw/datasette",
-    packages=find_packages(exclude='tests'),
+    packages=find_packages(exclude="tests"),
     package_data={"datasette": ["templates/*.html"]},
     include_package_data=True,
     install_requires=[
@@ -48,6 +48,7 @@ setup(
         "hupper==1.0",
         "pint==0.8.1",
         "pluggy>=0.12.0",
+        "uvicorn>=0.8.1",
     ],
     entry_points="""
         [console_scripts]