Modified the build script to sort out the images for me.

Author: switchtrue

build.sh

@@ -1 +1,9 @@
-zip FormAlert.zip LICENSE css/ js/ options.html README.md images/ manifest.json
+# Copy the images to the right locations fo the Chrome extension (as specified in manifest.json).
+mkdir images
+cp promotional_images/icon.png images/fa_icon_128.png
+
+# Create the archive for uploading.
+zip FormAlert.zip LICENSE css/* js/* options.html README.md images/* manifest.json
+
+# Tidy up the images directory.
+rm -rf images