pelican-quickstart: switch to jinja2

- Use the jinja2 templating language for Makefile, fabfile,
  pelicanconf, publishconf, and develop-server.sh
- Add logic in pelican_quickstart.py
- Let jinja2 handle opening and reading template files
- Remove thus unused functions for string.Template

pelican/tools/templates/publishconf.py.jinja2

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*- #
+from __future__ import unicode_literals
+
+# This file is only used if you use `make publish` or
+# explicitly specify it as your config file.
+
+import os
+import sys
+sys.path.append(os.curdir)
+from pelicanconf import *
+
+# If your site is available via HTTPS, make sure SITEURL begins with https://
+SITEURL = '{{siteurl}}'
+RELATIVE_URLS = False
+
+FEED_ALL_ATOM = 'feeds/all.atom.xml'
+CATEGORY_FEED_ATOM = 'feeds/%s.atom.xml'
+
+DELETE_OUTPUT_DIRECTORY = True
+
+# Following items are often useful when publishing
+
+#DISQUS_SITENAME = ""
+#GOOGLE_ANALYTICS = ""