Added documentation

Program.cs

@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.IO;
 using System.Runtime.InteropServices;
-using Microsoft.Win32.SafeHandles;
 using System.Threading.Tasks;
 
 namespace SharePointFileShareMigrationAnalysis

README.md

@@ -1,2 +1,20 @@
 # SharePointFileShareMigrationAnalysis
-A tool to analyse shares for a migration to SharePoint
+A tool to analyse file shares for a migration to SharePoint Online. 
+
+## Download
+See [releases](https://github.com/TVDKoni/SharePointFileShareMigrationAnalysis/releases)
+
+## Prerequisites
+* .Net Framework 4
+
+## The tool checks for
+* Max path length
+* Not allowed file and directory names
+* Too big files
+* Files with 0 length
+
+## Usage
+Download the zip, unpack it, enter in the config file the shares to be checked and run
+
+## Output
+A csv with all the errors and a csv with the statistics