rename dot_min app local var to DOT_MIN, as it's a constant.
Made the app name an app local var, rather than hardcoding it to Aestimia.

This will allow us to make the app name customizeable.
Themes can add to app.locals through app-locals.json in their root dir.

In particular, this allows themes to override APP_NAME, which is
what the CSOL theme now does.