Add a script to help generate the CHANGELOG

License: MIT
Signed-off-by: Jeromy <jeromyj@gmail.com>

bin/mkreleaselog

+#!/bin/bash
+
+LAST_TAG=$(git tag | grep -v -- '-rc' | grep 'v'| tail -n1)
+
+git log --oneline --merges --reverse $LAST_TAG...master |
+while read MERGE
+do
+	commit=$(echo $MERGE | awk '{ print $1 }')
+	prnum=$(echo $MERGE | awk '{ print $5 }' | tr -d '#')
+	desc=$(git show $commit | sed '8q;d' | sed 's/^    //g')
+	printf "  - %s ([ipfs/go-ipfs#%s](https://github.com/ipfs/go-ipfs/pull/%s))\n" "$desc" "$prnum" "$prnum"
+done