Resolve "Improve behaviour with umbrella projects"

Closes #7

See merge request !10

* Removed `:cabbage` and opted for standard unit-testing
* Refactored loaders to accept inline configuration
* Cleaned up and added logging at various levels to provide insight into what Weave is doing

Resolve "Add Contribution Guide"

Closes #14

See merge request !7

We hope this guide helps to on-board new contributors and will strive to add more to it as the project grows 😄

Resolve "Allow nil Environment Prefix"

Closes #16

See merge request !9

Cleaned up code while fixing defect that blocked people from using a missing / nil environment prefix

Resolve "Utilise Elixir 1.6 Code Formatter"

Closes #15

See merge request !8

- This will now be enforced during CI and `make lint`
- New `Makefile` target added to format code for you: `make format`
- Credo now only runs against `lib/`
- Behaviours now respect `load_configuration/1`, which has been standard for a while and ignored. Sorry!

Resolve "Adopt dshell Pattern"

Closes #9

See merge request !6

Resolve "Migrate CI to GitLab CI"

Closes #2

See merge request !1

Allowing handlers to return :ok and continue

Allowing handlers to return :ok and continue, and hoping nobody notices that our multi tests didn't work ...

configuration

  - New 'interface' to :weave now available, and required configuration
  - Updating documentation
  - Refactoring
  - Improving test coverage
  - Adding Credo