Check the hostname associated with the incoming report and extract tool
name appropriately. If hostname == tools.wmflabs.org then take the tool
name from the path. If hostname is anything else assume that the left
most '. separated component is the tool name (e.g.
"bash.toolforge.org").

Using the text indexed fields for aggregations requires Elasticsearch to
invert the inverted index as fielddata. This is expensive and
unnecessary because we are already creating an unindexed subfield in the
document mapping as suggested at
<https://www.elastic.co/guide/en/elasticsearch/reference/current/fielddata.html#before-enabling-fielddata>.

* Tox testing with py37
* Black formatting
* Lots of extra flake8 checks
* Fix violations from the changes above

Get rid of noise from browser extensions and similar client injected
sources by ignoring any report that describes a blocked URI that is not
HTTP/HTTPS.

Not bring able to specify fields in the query is lame.

Switch from query_string to simple_query_string for freeform search.
simple_query_string protects against syntax errors and instead does its
best to deal with ugly input. The default conjunction is also switched
to AND which is more likely to be what the end-user really wants in this
type of application.

Add primitive faceted search support.

Add a search screen that exposes the full power of the Elasticsearch
query string for searching the CSP report data.

Add reports which show the top 1000 tools and sites.

Add lists of the top 10 tools with violations and the top 10 external
sites reported.

The spec (<https://www.w3.org/TR/CSP/#grammardef-host-part>) says that
wildcards are allowed, but we are getting some reports that seem to
ignore that. This is something we will have to think about before making
the policy actually enforced.

We really don't need the full report so save space by only recording the
core fields that we will need for wall of shame reports.

I'm having trouble getting output from the built-in logger, so lets try
a more generic logging setup to see if that makes things work as
expected.