Enable multiprocessing on multiple computation (folder,gif)

Rework Transform Instanciation

Transform are now instanciate one time (first use). This modification
allow to load on memory GAN model one time given a huge gain on
multiply computation (tested on sample_dir give me 162 seconds to 92 seconds (amd FX feel bad)).
This modification break cpu multiprocessing support until a multiprocessing manager
is implement to avoid race condition. Also added --disable-persistent-gan to
disable in memory persitent gan for low memory environnement.

Add http(s) support for input

Create a dir that regrouping samples images

Fix Gif processing

Initial Daemon Support

* add "dreampower deamon" command
* simple deamon watching a tree directory patah  when .start file is create in one of
directory start processing this folder.

Fix some regression for the no so ultimate refactor :D

Ultimate Refactoring

* codeclimate.com rated A :D

More Refactor

* Refactor To improve code quality (codeclimate.com issues)

Processing Module Refactoring

Clean Code

* Fix issues highlight in codacy
* Code style PEP8 (naming, import...)
* Improve Docstring comments

Argv parsing change and refactoring