Update README.md

Author: mjiggidy

README.md

@@ -4,6 +4,17 @@
 
 `locatorator` will display the changes on-screen, as well as output a new marker list that can be imported into the new sequence to call out changes.
 
-Updated documentation coming soon.
+## Installation
+Gently clone this repo, then install:
+
+```bash
+pip3 install .
+```
+
+## Usage
+Once installed, two commands will be available to you:
+
+*`locatorator` - The GUI-based program
+*`locatorator_cli` - The command-line version of the program
 
 ![Locatorator on Mac OS X](docs/locatorator_osx.png)