Add write-log.sh script to generate changelog since last version

Logs will still need to be manually edited of course

build.sh

@@ -2,8 +2,7 @@
 
 find . -name '.git' -prune -o \
        -name '.gitignore' -prune -o \
-       -name '.xpi' -prune -o \
-       -name 'fw-update.sh' -prune -o \
-       -name 'build.sh' -prune -o \
+       -name '*.xpi' -prune -o \
+       -name '*.sh' -prune -o \
        -name '*~' -prune -o \
        -print | xargs zip scaffold.xpi

write-log.sh

@@ -0,0 +1,13 @@
+#!/bin/bash
+
+CHANGELOG="Changelog"
+TEMPFILE="`mktemp`"
+LASTTAG="`git tag -l v[0-9]* | tail -n 1`"
+
+echo "Version $1" > "$TEMPFILE"
+git log "$LASTTAG".. --reverse --no-merges --format="* %s" >> "$TEMPFILE"
+echo "" >> "$TEMPFILE"
+
+cat "$CHANGELOG" >> "$TEMPFILE"
+
+mv "$TEMPFILE" "$CHANGELOG"