Incendium

Fix

- **db**: check instance of `out_params`

BREAKING CHANGE

- calls to `db` functions should switch from passing
`dict` to `list[InParam]` and `list[OutParam]` where applicable

Feat

- add InParam, OutParam and Param to db

Fix

- update icendium.vision.gui constants

Fix

- bring back gui.CURSOR* constants

BREAKING CHANGE

- this project has turned into a pure Python project.
Jython is no longer recommended.

Fix

- **setup**: modify Python 2 Only classifier

Refactor

- move version information into its own module
- rename `_User` class to `IncendiumUser`
- import and use implementing classes rather than interfaces
- import unicode_literals
- remove copyright from modules