Preferences migrated to EasyPreferences library and its manifest

[hpsaturn]

Description

In order to improves the internal settings library, I added a new library to have some improvements like:

• [x] Unified strings for possible changes in settings-key manifest
• [x] changed primitives to EasyPreferences primitives.
• [x] added Auto print settings method
• [x] proposal to change the current preferences keys to CamelCase or different name syntax.

Auto print settings output:

Note:

This is a initial refactor, could be better but it right now it's working and also has backward compatibility.

[jgauchia]

Some preferences has no value output,

[jgauchia]

proposal to change the current preferences keys to CamelCase or different name syntax reviewed later in issue #120