reenabled admin area; outfitted apps.lyric.models w. AbstractBaseUser instead of custom user class; many other fns & several models updated to accomodate, such as set_unusable_password() method to base user model; reset staging db to prepare for refreshed lyric migrations to accomodate for retrofitted pw field

src/functional_tests/test_layout_and_styling.py

@@ -4,6 +4,7 @@ from selenium.webdriver.common.keys import Keys
 from .base import FunctionalTest
 from .list_page import ListPage
 
+
 class LayoutAndStylingTest(FunctionalTest):
     def test_layout_and_styling(self):
         self.browser.get(self.live_server_url)