Stegano

- fixed markdown of the previous release;

- updated dependencies;
- home page of the project is now: https://github.com/cedricbonhomme/Stegano

- new: Implemented LFSR generator (with tests and CLI)
([PR 27](https://github.com/cedricbonhomme/Stegano/pull/27))
- new: Implemented Ackermann generators CLI interface
([PR 26](https://github.com/cedricbonhomme/Stegano/pull/26))
- new: The Ackermann functions are not actual generators
([24](https://github.com/cedricbonhomme/Stegano/issues/24))
- new: add a shift parameter for the lsbmodule
([25](https://github.com/cedricbonhomme/Stegano/issues/25))
- fix: lsbset.hide cause .png transparent area lost
([23](https://github.com/cedricbonhomme/Stegano/issues/23))

- it is now possible to either pass the location of an image or directly pass
an already opened Image.Image to the hide and reveal methods;
- code re-formatted a bit with black.

- updated Pillow dependency to version 6.0.0 in order to fix a bug when opening
some PNG files (https://github.com/python-pillow/Pillow/issues/3557).

- updated Pillow dependency in order to fix a bug when opening some PNG files.