Write new tutorial which explains the build process and the boot process

[ivandavidov]

MLL has evolved from statically linked BusyBox environment to dynamically linked BusyBox environment where the GNU C library is used as mediation layer. On top of that, the most recent MLL version can be used on both legacy BIOS and modern UEFI firmware machines.

Unfortunately, the tutorial doesn't follow the evolution of the project.

The MLL project desperately needs series of new tutorials which should cover the following:

• Dynamic and static linking
• BIOS and UEFI boot schemes
• MLL build process in details (for BIOS and UEFI)
• MLL internal structure (configurable capabilities, overlay bundles , etc.)
• MLL boot process in details (from kernel to shell, including the overlay magic)