move utils and vendored libs into subfolders

setup.py

@@ -48,6 +48,11 @@ setuptools.setup(
         "wheel",
     ],
     install_requires=[
+        # only add things here that have corresponding apt python3-packages available
+        # anything added here also needs to be added to our package dependencies in
+        # stdeb.cfg (apt), archivebox.rb (brew), Dockerfile, etc.
+        # if there is no apt python3-package equivalent, then vendor it instead in
+        # ./archivebox/vendor/
         "requests==2.24.0",
         "atomicwrites==1.4.0",
         "mypy-extensions==0.4.3",
@@ -59,12 +64,6 @@ setuptools.setup(
         "python-crontab==2.5.1",
         "croniter==0.3.34",
         "w3lib==1.22.0",
-        "pocket==0.3.6",
-        # Some/all of these will likely be added in the future:
-        # wpull
-        # pywb
-        # pyppeteer
-        # archivenow
     ],
     extras_require={
         'dev': [
@@ -81,8 +80,6 @@ setuptools.setup(
             "bottle",
             "stdeb",
         ],
-        # 'redis': ['redis', 'django-redis'],
-        # 'pywb': ['pywb', 'redis'],
     },
     packages=[PKG_NAME],
     include_package_data=True,   # see MANIFEST.in