blog without cells dependency

+ right sidebar with rss link and latest posts
blog pagination
blog post pagination

+ rename page instance variable to page_index to prevent confusion
+ refactor pagination into partial
button to create new blog post in place
bugfix: bootstrap red css alert class
simplified user model

+ store editors in a time based system cache
+ only store user id in session
javascript user model
use javascript user model to prefill new blog post
extends boy dom element with information about the current object
update blog generator
disable new blog post button when clicked
custom published at blog post attribute
store author id and name on the blog post

+ no more CRM reference
Merge branch 'feature/blog-update' into develop

* feature/blog-update:
  store author id and name on the blog post
  custom published at blog post attribute
  disable new blog post button when clicked
  update blog generator
  extends boy dom element with information about the current object
  use javascript user model to prefill new blog post
  javascript user model
  simplified user model
  bugfix: bootstrap red css alert class
  button to create new blog post in place
  blog post pagination
  blog pagination
  blog without cells dependency
update changelog