Add Diskette

[sveetch]

Is your feature request related to a problem? Please describe.

A stable working beta of Diskette has been release.

Describe the solution you'd like

Include Diskette, it will need:

• Add diskette module in composer repository;
• Add diskette requirement >=0.3.2,<0.4.0;
• Add proper diskette settings for bireli project;
• Add disk-init, disk-dump, disk-load tasks to Makefile;
• Add django-apps/project_utils/diskette_definitions.py;
• Update django-apps/project_utils/composer_check.py to include Diskette processor;
• Add diskette to project toml;
• Add disk module for all compose applications that have something to dump;

[sveetch]

When it is done, the composer application template should be updated to create a dummy disk.py

[sveetch]

Diskette have been introduced in 0.3.12-pre.5