Start Notifications component refactor

Factor some things out of the mega Notifications component, and add a dummy
unit test to show willing

test/all-tests.js

@@ -3,5 +3,11 @@
 // Our master test file: uses the webpack require API to find our test files
 // and run them
 
-var context = require.context('./app-tests', true, /\.jsx?$/);
-context.keys().forEach(context);
+// ideally these unit tests could be run under nodejs rather than in a browser
+// via karma, but having two separate test frameworks in the same project
+// seems confusing
+var unit_tests = require.context('./unit-tests', true, /\.js$/);
+unit_tests.keys().forEach(unit_tests);
+
+var app_tests = require.context('./app-tests', true, /\.jsx?$/);
+app_tests.keys().forEach(app_tests);