Feature/mixins (#4)

* gogga.mixins

- Added new item

* README

- Updated documentation on build options

* gogga.tetss

- Added new test case

* README

- Added more information

* README

- CLeaned up

* README

- Renamed

README

- Fixed URL

RESDME

- Updated to reflect current version

Extras

- Fixed import issue

Feature/args helper (#3)

* Core

- Work-in-progress mixin

* Core

- Fixed imports

Test

- Out of module test added

* Core

- Cleaned up mixins

* Core

- Documented

* Test

- Documented

* Test

- made private

* Core

- Renamed to `LoggingFuncs`

* Test

- Use new name `LoggingFuncs`

* Core

- Cleanedxc uop

* Extras

- Added new package

* Core

- Moved

* Test

- Moved

* Extras (unittests)

- Cleaned up tests

* Test

- Cleaned up tests

Dub

- Updated tagline

README

- Updated API docs

Dub

- Upgraded `dlog` to version (atleast) `1.0.0`

GoggaLogger

- Any method which is templated AND marked as `final` will NOT be virtual.
- Undid the `final` so as to provide us with vtable support when using via the super type `Logger`. Prior to this it would use the ones declared directly in `Logger` and not the others as effectively no override was present.

README

- Fixed links