url not used, using tuple instead.
ResourceHandler handler is used to serve the resources, such as images or plain text files.
Add disqus.snippet which is the code snippet for disqus comment box.

Add github_fork.snippet which is the code snippet for github fork bar.

Add google_analytics.snippet which is the code snippet for google analytics service.
Add function get_3rd_party_snippet in module settings.
pass 3rd party code snippets to templates as params.
Move github fork bar code snippet to footer.html.
Replace google_analytics.html with google_analytics.snippet.
Replace disqus.html with disqus.snippet in all template files.
Remove unused files.
add '{%autoescape None%}' for footer.html.
Change github_link-->github_fork_link.
Merge branch 'master' of https://github.com/sunnycomes/IoVision into sunnycomes
Merge pull request #25 from sunnycomes/sunnycomes

Sunnycomes