fix print method for Python 3 and sign contributors agreement
use tales 'load' of chameleon and remove helper main_template
switch retail interface to bootstrap 3
add attachments and comments folder types and limit blog to blog entry
refactoring retail interface and views
delete old assets
merge master branch
merging from upstream
add boostrap 3.0.0 and jquery 2.0.3
add columns to comments and atttachments content type
add lorem ipsum to the blog_makelots console scritp
add jumbotron with the blog description
Merge pull request #163 from sverbois/ploneconf2013.fixdemo

modernize blog demo application