flutter_package / fluttertpc_get

This reverts commit d418403f.

This reverts commit d418403f.

typedef over dynamic Function for GetX/GetBuilder builders

- both GetX and GetBuilder
- now typesafe return instead of empty Function

Remove unnecessary files

Merge pull request #655 from jonataslaw/master

Made master branch work with relative paths

Fixes Get.create() and GetWidget()

Reverted GetWidget to original implementation ( to use with `@override`), added docs, renamed "name" to "tag" in `Get.create()` to be consistent with the rest of the GetInstance() methods.

- Although "nasty" solution, multiple instances were created with one Get.find() when using Get.create(), now the actual instance created from `GetInstance::<S>_startController()` > `GetInstance::<S>_initDependencies()` > `GetInstance::<S>_find()` is returned.
- added docs and impl to `GetWidget` to make it work with **DI** `tag`, I place it in the constructor directly (to use with `:super( tag: "something")` )... but we might actually use an override getter as well if needed.

Fix of Issue #643