ticket:3 for https://trac.42cc.co/agiloprojects/42-test-vechnoe2/ticket/3

Add test оf settings_context_processor
ticket:3 for https://trac.42cc.co/agiloprojects/42-test-vechnoe2/ticket/3

Add django-override-settings package.
ticket:4 for https://trac.42cc.co/agiloprojects/42-test-vechnoe2/ticket/4

Change.
ticket:4 for https://trac.42cc.co/agiloprojects/42-test-vechnoe2/ticket/4

Init.
ticket:4 for https://trac.42cc.co/agiloprojects/42-test-vechnoe2/ticket/4

Add settings_processor
ticket:4 for https://trac.42cc.co/agiloprojects/42-test-vechnoe2/ticket/4

Change.
Merge branch 't4_context_settings_processor'