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.in

@@ -1,25 +0,0 @@
-#!/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 = ""