Up to now local_settings.py was used for binder specific configuration values.
This commit moves these values to settings.py, removes local_settings.py
from version control and adds logic to settings.py to allow settings in
local_settings.py to overwrite ones defined in settings.py, enabling
local_settings.py to be used as installation specific configuration file,
e.g. for custom database configuration.
When using Djangos "makemessages" command to collect strings for i18n it only
considers templates with a file extenions of .txt and .html by default. For
more details see:
https://docs.djangoproject.com/en/dev/topics/i18n/translation/#message-files
Also when Django is refering to default template names (e.g. for error handling
or accounts) it always refers to file names with .html as file extension.
To avoid hassle in the future this commit aligns the file extension used for
templates to Djangos default of .html.
This commit introduces automatic selection of the default TSIG key for all
available actions (add, delete). For enabling that it has been necessary to
provide the whole BindServer object to the template, which caused some
additional changes.
I also took the opportunity to unify some styling (indentation, linebreaks) of
the HTML templates.