Term app created with all functionalities implemented

**Features Implemented**
* Created Term app with create , edit , delete functionalities.
* Term app landing page is the description & some statistics of Term app 
* There is show more button on landing page which will redirect to the card view of term instances.
* Script added for entring the term instances in ATLAS group. Ran successfully in local according to the data provided using csv file.
* Included new templates for displaying create , edit  and details view page.