Initial 3DS port

Changes

• Initial release

Instructions

• Create sdmc:/3ds/dosbox
• Run dosbox-3ds.3dsx once, to generate dosbox-SVN.conf
• Edit dosbox-SVN.conf, find and edit [autoexec]:
  Example:

[autoexec]
# Lines in this section will be run at startup.
# You can put your MOUNT lines here.

mount C sdmc:/DOS/Dangerous.Dave
c:
DAVE.EXE
exit

• Create .xml shortcuts to load custom .conf files
  Example:

<shortcut>
	<name>DOXBox: Dangerous Dave</name>
	<icon>/3ds/DOSBox/dosbox-3ds.smdh</icon>
	<executable>/3ds/DOSBox/dosbox-3ds.3dsx</executable>
	<arg>-conf /3ds/DOSBox/Games/dosbox-dave.conf</arg>
</shortcut>