Added some tools to help with a deployment.

* Makefile: Added.
* bin/get-chromacs-version.bash: Extracts version information from
manifest.json.

Makefile

@@ -0,0 +1,20 @@
+VERSION=$(shell bin/get-chromacs-version.bash)
+NAME=builds/chromacs-$(VERSION).crx
+
+all: $(NAME)
+
+$(NAME): manifest.json chromacs.js
+	crxmake --pack-extension-key=${HOME}/etc/chromacs.pem \
+		--extension-output=$(NAME) \
+		--pack-extension=. \
+		--ignore-dir="(bin|builds)" \
+		--ignore-file=Makefile
+
+clean:
+	rm -f $(NAME)
+
+tag:
+	git tag "$(VERSION)"
+
+# build-name: chromacs.crx
+# 	cp chromacs.crx builds/chromacs-$(VERSION).crx

bin/get-chromacs-version.bash

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+# extract the version from the manifest file
+
+if [ ! -f "manifest.json" ]; then
+  echo "No manifest file in this directory." >&2
+  exit 1
+fi
+
+grep '"version"' manifest.json \
+  | perl -nle '/:\s*"(.+)"/ and print $1'