add vendoring with go dep

vendor/github.com/vmware/govmomi/govc/usage.sh

@@ -0,0 +1,56 @@
+#!/bin/bash -e
+
+for var in $(env | grep GOVC_) ; do
+  eval "unset ${var/=*}"
+done
+
+common_opts=$(cat <<EOF
+  -cert=                    Certificate [GOVC_CERTIFICATE]
+  -debug=false              Store debug logs [GOVC_DEBUG]
+  -dump=false               Enable output dump
+  -json=false               Enable JSON output
+  -k=false                  Skip verification of server certificate [GOVC_INSECURE]
+  -key=                     Private key [GOVC_PRIVATE_KEY]
+  -persist-session=true     Persist session to disk [GOVC_PERSIST_SESSION]
+  -tls-ca-certs=            TLS CA certificates file [GOVC_TLS_CA_CERTS]
+  -tls-known-hosts=         TLS known hosts file [GOVC_TLS_KNOWN_HOSTS]
+  -u=                       ESX or vCenter URL [GOVC_URL]
+  -vim-namespace=urn:vim25  Vim namespace [GOVC_VIM_NAMESPACE]
+  -vim-version=6.0          Vim version [GOVC_VIM_VERSION]
+  -dc=                      Datacenter [GOVC_DATACENTER]
+  -host.dns=                Find host by FQDN
+  -host.ip=                 Find host by IP address
+  -host.ipath=              Find host by inventory path
+  -host.uuid=               Find host by UUID
+  -vm.dns=                  Find VM by FQDN
+  -vm.ip=                   Find VM by IP address
+  -vm.ipath=                Find VM by inventory path
+  -vm.path=                 Find VM by path to .vmx file
+  -vm.uuid=                 Find VM by UUID
+EOF
+)
+
+cat <<'EOF'
+# govc usage
+
+This document is generated from `govc -h` and `govc $cmd -h` commands.
+
+The following common options are filtered out in this document,
+but appear via `govc $cmd -h`:
+
+```
+EOF
+
+printf "%s\n\`\`\`\n\n" "${common_opts}"
+
+cmds=($(govc -h | grep -v Usage))
+
+opts=($(cut -s -d= -f1 <<<"$common_opts" | xargs -n1 | sed -e 's/^/\\/'))
+filter=$(printf "|%s=" "${opts[@]}")
+
+for cmd in "${cmds[@]}" ; do
+    printf "## %s\n\n" "$cmd"
+    printf "\`\`\`\n"
+    govc "$cmd" -h | egrep -v "${filter:1}"
+    printf "\`\`\`\n\n"
+done