test: add CI (#329)

This adds two CI runs: a quick one that happens for every pull
request and merge to master, and a longer one that happens daily.

This also adds a new installation group to setup.py because the
`easy` group isn't currently installable, and some of the dependencies
specified there need to be present for the tests to run.

tests/test_units.py

@@ -260,6 +260,9 @@ blocks:
     )
 
 
+# Some changes to the brozzler ydl interface not represented in this test
+# https://github.com/internetarchive/brozzler/issues/330
+@pytest.mark.xfail
 def test_proxy_down():
     """
     Test all fetching scenarios raise `brozzler.ProxyError` when proxy is down.
@@ -471,6 +474,9 @@ def test_thread_raise_second_with_block():
     assert isinstance(thread_caught_exception, Exception2)
 
 
+# brozzler.ydl.YoutubeDLSpy is missing
+# https://github.com/internetarchive/brozzler/issues/330
+@pytest.mark.xfail
 def test_needs_browsing():
     # only one test case here right now, which exposed a bug