more modular template and static file structure

- pug.invest.templates are unable to load static/js files the need
- base.html is duplicated across apps
- miner/static/js should be moved to crawlnmine/static/js so that other apps can use when miner isn't installed
+ most apps now use the base.html located in templates/base.html
+ django-bootstrap-toolkit no longer used in the shared base.html
+ miner/static/miner/js moved to miner/static/js so that other apps can override
+ views use templates from their own app
+ pug modules/packages import without the `pug...` prefix to improve portability/modularity of those modules (so they can be spun off as separate packages)