add release notes

doc/release-notes/release-notes-3.0.1.md

@@ -0,0 +1,18 @@
+# Altitude 3.0.1
+
+This is a patch release.
+
+Please report bugs using the issue tracker at github: https://github.com/thelindaprojectinc/altitude/issues
+
+## How to Upgrade
+Shutdown Altitude if it is already running and then run the installer.
+
+## About this Release
+
+### What's New
+- Temporarily removed 'bootstrap' button from wallet tools
+
+### Bug Fixes
+- Fixed 'Sending transaction' notification appearing twice.
+- Fixed formatting of coins on transactions page.
+- Updating transaction categorising.