Replace godep with vndr

Vndr has a simpler configuration and allows pointing to forked
packages. Additionally other docker projects are now using
vndr making vendoring in distribution more consistent.

Updates letsencrypt to use fork.
No longer uses sub-vendored packages.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

vendor/google.golang.org/appengine/internal/regen.sh

@@ -1,40 +0,0 @@
-#!/bin/bash -e
-#
-# This script rebuilds the generated code for the protocol buffers.
-# To run this you will need protoc and goprotobuf installed;
-# see https://github.com/golang/protobuf for instructions.
-
-PKG=google.golang.org/appengine
-
-function die() {
-	echo 1>&2 $*
-	exit 1
-}
-
-# Sanity check that the right tools are accessible.
-for tool in go protoc protoc-gen-go; do
-	q=$(which $tool) || die "didn't find $tool"
-	echo 1>&2 "$tool: $q"
-done
-
-echo -n 1>&2 "finding package dir... "
-pkgdir=$(go list -f '{{.Dir}}' $PKG)
-echo 1>&2 $pkgdir
-base=$(echo $pkgdir | sed "s,/$PKG\$,,")
-echo 1>&2 "base: $base"
-cd $base
-
-# Run protoc once per package.
-for dir in $(find $PKG/internal -name '*.proto' | xargs dirname | sort | uniq); do
-	echo 1>&2 "* $dir"
-	protoc --go_out=. $dir/*.proto
-done
-
-for f in $(find $PKG/internal -name '*.pb.go'); do
-  # Remove proto.RegisterEnum calls.
-  # These cause duplicate registration panics when these packages
-  # are used on classic App Engine. proto.RegisterEnum only affects
-  # parsing the text format; we don't care about that.
-  # https://code.google.com/p/googleappengine/issues/detail?id=11670#c17
-  sed -i '/proto.RegisterEnum/d' $f
-done