Django-node

- Bugfix to correct the DJANGO_NODE['PATH_TO_NPM'] setting.

- Adding support for node.run to temporarily toggle NODE_ENV to production.

- Improving the clarity of the terminal output generated by `django_node.npm.install`.

- API change for `django_node.npm.install`
- Extra arguments are now accepted as `*args`, rather than as a tuple. `silent` must now be an explicit keyword argument.

- Removed the `RAISE_ON_MISSING_DEPENDENCIES` and `RAISE_ON_OUTDATED_DEPENDENCIES` settings.

- Most of the functions are now exposed from `django_node.node` and `django_node.npm`.
- The Node.js API is now composed of...
- `django_node.node.is_installed`
- `django_node.node.version`
- `django_node.node.version_raw`
- `django_node.node.run`
- `django_node.node.ensure_installed`
- `django_node.node.ensure_version_gte`
- The NPM API is now composed of...
- `django_node.npm.is_installed`
- `django_node.npm.version`
- `django_node.npm.version_raw`
- `django_node.npm.run`
- `django_node.npm.ensure_installed`
- `django_node.npm.ensure_version_gte`
- `django_node.npm.install`