Modified readme to describe updated directory structure.
Modified readme to describe updated directory structure.

Beachbot330/navxmxp,kauailabs/navxmxp,Beachbot330/navxmxp,kauailabs/navxmxp,kauailabs/navxmxp,aeastet/navxmxp,aeastet/navxmxp,Beachbot330/navxmxp,kauailabs/navxmxp,Beachbot330/navxmxp,aeastet/navxmxp,aeastet/navxmxp,aeastet/navxmxp,Beachbot330/navxmxp,Beachbot330/navxmxp,kauailabs/navxmxp,kauailabs/navxmxp,kauailabs/navxmxp,aeastet/navxmxp