Cereja

- fix filter bugs
- implements load functions

* Filetools: added doc and update version
* Filetools: added to_dict function
* Filetools: added csv utility
* Filetools: fix load_files

[see README](https://github.com/jlsneto/cereja/blob/master/README.md)

* Refactor corpus class

* Datatools: added more functions and utilities

* Config: Create basic config

* Datatools: Added basic config control and more improves

* Datatools: improves corpus data view

* Filetools: add utility load from dir

* Datatools: fix bugs and move intern function to other scope

* Datatools: deprecated split_and_save and add new save method

* Datatools: fix configuration bugs

* Datatools: added compatibility with legacy test data

* Datatools: fix legacy verify bug

* Filetools: read and write json data (baseline)

* Filetools: create .json support

* Filetools: added exception to dict data without .json ext

* Filetools: added getitem for .json data

* Filetools: remove from .json data

* Filetools: fix json utility

* Filetools: fix tests

- Added Corpus Toolkit
- Improves flatten function
- Improves file tools
- Fix bugs