Blog content, user roles, taxonomies added

At this moment just one content type is being added here, to test
if we can setup a workflow as desired. Very soon we will be adding
other content types here.

references #14
Configurations for workbench based content w/f

This feature should have been made dependent on the one that holds
content types and user roles details. Perhaps a mistake that we can
fix in the future. (At this moment I am not too sure of the best practice
around this.

references #14
Permissions updated for workbench based moderation

This and the two commits just prior to this are roughly based around the idea
of structuring features for better managment as stated here
- http://drupal.stackexchange.com/questions/23489

references #14