Breadcrumbs on collection view implemented

Breadcrumbs implemented for collection view

Modification in : 
```
node_details_base.html   -->  collection_ajax_view.html template included to display and update collection list
collection_ajax_view.html  -->  breadcrumbs implemented for collection view 
ajax-urls.py  -->  url included for collection_view on ajax request 
ajax_views.py  -->  breadcrumbs are stored in buffer and renders it to the page_details template
page.py  -->  First time stores the breadcrumbs list which updates for every collection view
``` 
[NOTE : Breadcrumbs are not currently working after editing any resource, little modification and logic needs to be implemented , i am currently working on it]