Bouding box uses wrong conversion between degrees and meters

[Helium314]

in

DejaVu/app/src/main/java/org/fitchfamily/android/dejavu/BoundingBox.java

Lines 91 to 92 in e54aae2

	double locEast = lon + (radius_ew * BackendService.METER_TO_DEG) * cosLat;
	double locWest = lon - (radius_ew * BackendService.METER_TO_DEG) * cosLat;

east-west size of the bounding box is set by converting meters to degrees and multiplying with cosLat. This results in narrower bouding boxes (in degrees) for high latitude.
But actually the bouding boxes with the same e-w width in metes should get wider if we go towards the poles.

Proposed solution:
change to (radius_ew * BackendService.METER_TO_DEG) / cosLat;
and change

DejaVu/app/src/main/java/org/fitchfamily/android/dejavu/BoundingBox.java

Line 134 in e54aae2

radius_ew = (float)(((east - center_lon) * BackendService.DEG_TO_METER) / cosLat);

to ((east - center_lon) * BackendService.DEG_TO_METER) * cosLat