move pttodo-cli up from /cmd/

cmd/install.sh

@@ -0,0 +1,20 @@
+#! /bin/bash
+
+cd "$(dirname "$BASH_SOURCE")"
+
+binary_name="$(head -n 1 go.mod  | awk '{print $NF}' | sed 's/.*\///')"
+git_commit="$((
+   git rev-list -1 HEAD
+   if git diff | grep . > /dev/null; then
+      echo "-dirty"
+   fi
+) 2> /dev/null | tr -d '\n')"
+
+GOFLAGS="" \
+GO111MODULE="" \
+CGO_ENABLED=0 \
+go build \
+   -o $GOPATH/bin/$binary_name \
+   -a \
+   -installsuffix cgo \
+   -ldflags "-s -w -X main.GitCommit=$git_commit"