Feature update

Documenting:

• Updated documentation.

Enhancements:

• Made the background field a global setting;
• Added the ability to change global settings and read them while the Logger is running;
• Added settings arguments to the "simple" Logger constructor;
• Hid the "mighty" Logger, but it can be used via the might() method;
• Prohibited the creation of more than one "simple" Logger object, but "simple" and "mighty" Loggers can coexist, since "simple" uses "mighty" and is not inherited.