Added a section for flashing ntrboot while booted into a flashcart on a an unmodded/working syste.
Added a page for removing ntrboot to restore the flashcart's functionality.
Added some extra info about the DS and DS Lite screen types.
The current tree is a mixture of different numbers of spaces. Unify
them to 4-space indents, as this seems to be the configuration
supported on most platforms out there.
