Moderately large pull request

The following changes were made in this pull:

####Restructuring of data
* Now `harp.json` shows the `urls` in two parts `social` and `project`. This facilitated our footer to be created more dynamically. It also allowed more simpler looping and simpler linking to the `/img/` directory.
* Now `public/_data.json` is more efficient at storing only the strings of code, these can then be manipulated to link directly to the images without storing a separate link. Also stored as an array for quicker access.
* `public/posts/_data.json` now stores the `authors` and `authorprofiles` as arrays instead of object properties. This makes more sense as we can now manipulate it for things like commas and and's in our views.

#### Code 
* Adds a `for` loop in `/pulbic/_partials/_footer.json`
* `/public/bacteriart.jade` is now using the mixin to dynamically load the data from the json file.
* `blog.jade` and `index.jade` have been modified to reflect the new way of storing data and to make it more efficient in lopping. the `index.jade` page will only show the first 5 posts.
* Minor aesthetic upgrade to `/public/_partials/_navbar.jade` (*still not to my satisfction*)

Please see the changes and pull as seen appropriate.