Update version to v0.3.0

Author: bluekeyes

ExportCutlist.manifest

@@ -7,6 +7,6 @@
   },
   "supportedOS": "windows|mac",
   "editEnabled": true,
-  "version": "v0.2.0",
+  "version": "v0.3.0",
   "runOnStartup": true
 }

README.md

@@ -21,7 +21,7 @@ document structure or workflow.
 
 ## Installation
 
-1. Download the [latest release](https://github.com/bluekeyes/Fusion360-ExportCutlist/archive/v0.2.0.zip)
+1. Download the [latest release](https://github.com/bluekeyes/Fusion360-ExportCutlist/archive/v0.3.0.zip)
 2. Unzip the file on your computer
 3. Start Fusion360 and open the "Scripts & Addins" dialog (Shift+S)
 4. Go to the "Addins" tab