Frigg-settings

Fix
- Don't crash if no tasks are provided to FriggSettings
- Return None from load_settings_file if path doesn't exist

Fix
- Add defaults in init
- Make sure untouched defaults does not disappear

Feature
- Add has_after_tasks

Feature
- Store settings in object instead of dict

Breaking
- The parser will now return an object instead of a dict.

Feature
- Add parsing of v2 of the settings specification

Breaking change:

Loading build settings will from now on result in a new structure. This structure has a dict in the task property, which contains lists for the different task types. Example yaml of the new structure:


tasks:
setup:
- npm install
tests:
- npm test


Frigg yaml files on the old format is still supported, however, the output of the parsing will represent the new structure.

Fix
- Add defaults for setup_tasks and tasks in settings obj