ticket:348 removed wsapi app, removed wsapi_settings
ticket:348 wsapi replaced by cghub_python_api
ticket:348 repaired tests
Merge branch 't348_replace_wsapi_app_by_cghub_python_api'
ticket:348 removed unnecessary imports
ticket:349 implemented requests caching while testing
ticket:349 cghub_python_api copied into cghub dir
ticket:349 removed celery
ticket:349 fixed tests
ticket:349 minified js and css
Merge branch 't349_site_shouldnt_use_celery'
ticket:350 added cart models, cart class and tests
ticket:350 fixes for cart/cache.py
ticket:350 cart utils functions replaced by Cart class
Merge branch 't350_cart_should_be_maintained_as_a_table_in_mysql'
ticket:351 fixed issues with metadata downloading
ticket:351 modified documentation
Merge branch 't351_adapt_cart_cache_to_cart_stored_in_database'