Updated README with correct information.

apps/cli/executables/null/README.md

+This is the null executable, a baseline test of the functionality of the Workspaces system.
 
-# datafetcher: data-fetcher for the AAT/PPI
-
-This is an implementation of the NRAO archive's Java-based data-fetcher in Python, as a research experiment on how it could be modularized and re-structured.
- 
-Use cases datafetcher is intended to handle:
-   * works for both science products and ancillary products
-   * download a product from the NRAO archive by specifying its product locator
-   * download a product from the NRAO archive by providing a path to a locator report
-   * streaming or direct copy downloads based on file location and execution site
-   
-This is intended to be a library wrapped in a command line interface.
+It can:
+- Print a message to stderr
+- Print a message to stdout
+- Exit with status code -1
+- Exit with random status code in [-50, 50]
+- Sleep for 5 seconds
+- Abort and dump the core
  
 ```
-usage: datafetcher [-h]
-             (--product-locator PRODUCT_LOCATOR | --location-file LOCATION_FILE)
-             [--dry-run] [--output-dir OUTPUT_DIR] [--verbose]
-             [--profile PROFILE]
+usage: null [-h] [-v] [-pe | -g | -ef | -er | -n | -d]
+
+Workspaces null executable, a status capture test of the system. Version 4.0.0a1.dev1
 
-Retrieve a product (a science product or an ancillary product) from the NRAO archive,
-either by specifying the product's locator or by providing the path to a product
-locator report.
+optional arguments:
+  -h, --help          show this help message and exit
+  -pe, --print-error  print out aggressive message to stderr
+  -g, --greeting      print out a friendly greeting to stdout
+  -ef, --exit-fail    print error message and exit with status code -1
+  -er, --exit-random  print error message and exit with random status code within [-50, 50]
+  -n, --nap           take a short nap
+  -d, --dump          abort program and dump core
 
-Optional Arguments:
-  --dry-run             dry run, do not fetch product
-  --output-dir OUTPUT_DIR
-                        output directory, default current directory
-  --verbose             make a lot of noise
-  --profile PROFILE     CAPO profile to use
+options:
+  settings for altering program behavior
 
-Return Codes:
-	1: no CAPO profile provided
-	2: missing required setting
-	3: request to locator service timed out
-	4: too many redirects on locator service
-	5: catastrophic error on request service
-	6: product locator not found
-	7: not able to open specified location file
-	8: error fetching file from NGAS server
-	9: retrieved file not expected size
+  -v, --verbose       allow the program the gift of speech
 ```