Add release notes and update pack script

Stop on errors, build a .pdf documentation and also the release
notes.

doc/ReleaseNotes.md

@@ -0,0 +1,33 @@
+# Release Notes for Ladybug
+
+## Important information
+
+Ladybug is a bank switched module which consists of three pages. Ensure that you load it properly into your HP-41 for correct operation. The supplied `.mod` file is properly configured for this, but if you extract the pages and do it manually, be careful!
+
+
+## Version 0B
+
+Minor update, May 19, 2017.
+
+### Notes
+
+* Includes an overlay for i41CX+ emulator (iPhone) contributed by Robert Meyer.
+
+* A `.pdf` version of the documentation is now part of the distribution.
+
+* Various updates have been made to the documentation.
+
+### Corrections
+
+* The buffer created by Ladybug is no longer removed by "`PACK`" or "`GTO ..`". The buffer would be removed if such operation was invoked before turning the calculator off (at least once).
+
+* Ladybug now works properly with very early HP-41C calculators.
+
+* No longer crashes if another module misbehaves and leave a secondary bank enabled when returning to the operating system, and that module is located in such a way that the bank switch mechanism is shared with Ladybug.
+
+* Minor change to the `.mod` file metadata to avoid any possible confusion to the module reader on how to group and locate the pages.
+
+
+## Version 0A
+
+Original release for early adaptors, January 10, 2017.

scripts/pack

@@ -1,18 +1,25 @@
 #!/bin/bash
 
+# Stop on failure
+set -e
+
 # Build module and documentaiton
 pushd src
 make
 popd
 pushd doc
 make html
+make latexpdf
+markdown  ReleaseNotes.md >ReleaseNotes.html
 popd
 
 # Set up a dist folder
 rm -rf dist
 mkdir dist
 cp src/ladybug.mod dist/
 cp -R doc/_build/html dist/doc
+cp doc/_build/latex/ladybug.pdf dist/doc
+cp doc/ReleaseNotes.html dist/
 
 # Clean up some stuff we do not want
 rm -rf dist/doc/_sources