#1
Added JS function to prevent space in Template Name
Involved files - (main.js, template_insert.php)

#2 
Added Envato API
Envato Dashboard

Involved files

application/controllers/envato.php
application/views/sidebar.php
application/views/envato_dashboard.php
application/views/settings.php
application/views/header.php
application/controllers/settings.php
application/controllers/templates.php
application/libraries/EnvatoMarketplace.php
application/controllers/ajax.php