Add TDAL capability

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TDAL is a ATAK plugin which allows the display of a second coordinate system (particularly adding British National Grid). It also allows offline geocoding.

The add-in is available from the TAK product center through the google play store.

https://play.google.com/store/apps/details?id=com.atakmap.android.bng.plugin&hl=en-US
TDAL User Guide.pdf