Update and rebuild IPFS from source

update_ipfs.sh

#!/bin/sh
set -e
echo "IPFS local gateway must be running!!!"
go get -u -v github.com/whyrusleeping/gx && go get -u -v github.com/whyrusleeping/gx-go
go get -v -u -d github.com/ipfs/go-ipfs && cd $GOPATH/src/github.com/ipfs/go-ipfs
ln -sf $GOPATH/bin/gx $(grep gx_bin= Makefile | cut -d'=' -f2)
ln -sf $GOPATH/bin/gx-go $(grep gx-go_bin= Makefile | cut -d'=' -f2)
export IPFS_API=localhost:8080
make install