Updated readme

README.md

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 # Chronometer
 A module for measuring performance of Powershell scripts, one line at a time
+
+## Project status
+Experimental. Just a working idea at the moment. Functions and argument names are still up in the air. Also don't consider it stable or tested. Use at your own risk.
+
+# Getting started
+## Prerequirements
+You need to have Powershell 5.0 or newer. This module uses classes.
+
+## Installing Chronometer
+Place the Chronometer folder into your `$PSModulePath`. I will publish to the Powershell Gallery once the project is more stable.
+
+## Basic usage
+Provide a script file and a command to execute.
+
+    $path = myscript.ps1
+    Get-Chronometer -Path $path -Script {. .\myscript.ps1} -OutVariable report
+    $report.ToString()
+
+## Things to know
+The `Path` can be any ps1 and the script can run any command. Ideally, you would either execute the script or load the script and execute a command inside it. 
+
+## General comments
+The user experience is important to me but I am working on the core logic right now. I will loop back to make it more intuitive and simple to use. 
+
+