Add further docstrings to Notifier classes
Add further docstrings to Notifier classes

torchbox/wagtail,FlipperPA/wagtail,jnns/wagtail,kaedroho/wagtail,mixxorz/wagtail,gasman/wagtail,FlipperPA/wagtail,gasman/wagtail,zerolab/wagtail,torchbox/wagtail,jnns/wagtail,mixxorz/wagtail,thenewguy/wagtail,thenewguy/wagtail,zerolab/wagtail,kaedroho/wagtail,takeflight/wagtail,zerolab/wagtail,zerolab/wagtail,wagtail/wagtail,kaedroho/wagtail,FlipperPA/wagtail,mixxorz/wagtail,rsalmaso/wagtail,kaedroho/wagtail,rsalmaso/wagtail,jnns/wagtail,kaedroho/wagtail,jnns/wagtail,takeflight/wagtail,torchbox/wagtail,thenewguy/wagtail,wagtail/wagtail,wagtail/wagtail,mixxorz/wagtail,gasman/wagtail,rsalmaso/wagtail,takeflight/wagtail,zerolab/wagtail,thenewguy/wagtail,wagtail/wagtail,gasman/wagtail,takeflight/wagtail,mixxorz/wagtail,rsalmaso/wagtail,torchbox/wagtail,gasman/wagtail,thenewguy/wagtail,rsalmaso/wagtail,wagtail/wagtail,FlipperPA/wagtail