Add quickstart to readme + clarify settings.ini dependency in results

README.md

@@ -19,10 +19,61 @@ Two scripts:
 * Right now this only supports Postgres. It would be trivial to modify to use anything else supported by PHP's PDO.
 * It's very unscientific. Don't rely on this for anything more than a vague notion of how something is performing.
 * The results script loads the entire set of queries + timings into RAM to process them. If you run this too long and
-generate too many results it will not be very performant or require a huge amount of RAM to actually generate the results.
+  generate too many results it will not be very performant or require a huge amount of RAM to actually generate the results.
+* The results script uses the _current_ settings file when calculating QPS, figuring out which worker files to read, etc.
+  The settings.ini file should be kept alongside the results files if you plan on reprocessing them again later for any
+  reason.
 
 ## How do I use this?
 
+```
+$ mkdir test-1
+
+$ cd test-1
+
+$ cat > settings.ini
+workers=16
+duration=30
+
+[db]
+host=127.0.0.1
+port=5432
+username=postgres
+password=postgres
+database=my_database
+^D
+
+$ cat > generator.php
+<?php
+return "select * from my_table where id=".mt_rand(1, 65000);
+^D
+
+$ php path/to/bench.php generator.php
+[Worker 0] Start
+[Worker 1] Start
+[Worker 2] Start
+[Master] Start
+[Worker 3] Start
+[Worker 3] Stop
+[Worker 1] Stop
+[Worker 2] Stop
+[Master] Stop
+[Worker 0] Stop
+
+$ php path/to/results.php
+  5 percentile: 0.0417s
+ 25 percentile: 0.042s
+ 50 percentile: 0.0424s
+ 75 percentile: 0.0431s
+ 95 percentile: 0.0459s
+ 99 percentile: 0.0505s
+QPS: 93.6
+
+$
+```
+
+## Okay... what?
+
 ### Set up test environment
 
 The settings will be read from the current folder, and the results written back out to it. So probably create an empty