Added linkchecker.py

# 
# Principal author: Abhishek Tiwary 
# 
# License: Creative Commons (check with Alex, update and release as per the 
# licensing for existing Nan-Tien code) 
#
# Also set up a Github account for this 
# 
# A script to traverse the http://paradeofthebuddhas.org/ website and figure 
# out whether links on the page are active or broken. 
# A link, as of this writing, is classified as one of: 
#   - an href in an anchor tag 
#   - an href in an img tag 
#   - an image source 
# 
# The general algorithm is as follows: 
#   1. parse the main page, get all links 
#   2. figure out which links are active (and which are inactive) 
#   3. use the xmlrpc 'API' to get a list of URLs to all (wordpress) pages
#   4. iterate through said list, parse pages for all unique links 
#   5. as in 2. 
#   6. use the xmlrpc 'API" to get a list of URLs to all posts 
#   7. as in 4. but for posts 
#   8. write out an HTML page 
#