#70: Update readme

README.md

@@ -91,6 +91,8 @@ This is illustrated below.
     │   └── test_base
     │       ├── constants.py
     │       └── rest_test.py
+    ├── util
+    │   └── icat_db_generator.py
     ├── logs.log
     └── config.json
  `````
@@ -119,6 +121,14 @@ and updating them, in a form easily converted to JSON.
 
 
 
+## Database Generator
+There is a tool to generate mock data into the database. It is located in `util/icat_db_generator.py`
+By default it will generate 20 years worth of data (approx 70,000 entities). The script makes use of 
+`random` and `Faker` and is seeded with a seed of 1. The seed and number of years of data generated can 
+be changed by using the arg flags `-s` or `--seed` for the seed, and `-y` or `--years` for the number of years.
+For example:  
+`python util/icat_db_generator.py -s 4 -y 10` Would set the seed to 4 and generate 10 years of data.
+
 ## Running Tests
 To run the tests use `python -m unittest discover`