added json write serialization to LidarData

#include "LidarData.h"

#include <QFile>

#include <QJsonArray>

#include <QJsonDocument>

#include <QJsonObject>

#include <QList>

#include <QSharedPointer>

#include "Angle.h"

#include "Distance.h"

#include "FileName.h"

#include "IException.h"

#include "Latitude.h"

#include "LidarControlPoint.h"

#include "Longitude.h"

#include "SurfacePoint.h"

namespace Isis {

   * @param FileName outputFile Name of the file to write to.

   */

  void LidarData::write(FileName outputFile) {

    // Set up the output file

    QFile saveFile(outputFile.expanded());

    if (!saveFile.open(QIODevice::WriteOnly)) {

      QString msg("Could not open " + saveFile.fileName());

      throw IException(IException::User, msg, _FILEINFO_);

    }

    // Serialize LidarData

    QJsonObject lidarDataObject;

    QJsonArray pointArray;

    // Serialize the LidarControlPoints it contains

    foreach (QSharedPointer<LidarControlPoint> lcp, points()) {

      // Serialize LidarControlPoint

      QJsonObject pointObject;

      pointObject["id"] = lcp->GetId();

      pointObject["range"] = lcp->range();

      pointObject["sigmaRange"] = lcp->sigmaRange();

      pointObject["time"] = lcp->time().Et();

      // Serialize the lat/lon/radius (AprioriSurfacePoint)

      SurfacePoint aprioriSurfacePoint = lcp->GetAprioriSurfacePoint();

      pointObject["latitude"] = aprioriSurfacePoint.GetLatitude().planetocentric(Angle::Units::Degrees);

      pointObject["longitude"] = aprioriSurfacePoint.GetLongitude().positiveEast(Angle::Units::Degrees);

      pointObject["radius"] = aprioriSurfacePoint.GetLocalRadius().kilometers();

      QJsonArray measureArray;

      // Serialize the ControlMeasures it contains

      foreach (ControlMeasure *measure, lcp->getMeasures()) {

        // Serialize ControlMeasure

        QJsonObject measureObject;

        measureObject["line"] = measure->GetLine();

        measureObject["sample"] = measure->GetSample();

        measureObject["serialNumber"] = measure->GetCubeSerialNumber();

        measureArray.append(measureObject);

      }

      // Add the ControlMeasures to the LidarControlPoint

      pointObject["measures"] = measureArray;

      pointArray.append(pointObject);

    }

    // Add the LidarControlPoints to the LidarData

    lidarDataObject["points"] = pointArray;

    // Write the JSON to the file

    QJsonDocument lidarDataDoc(lidarDataObject);

    saveFile.write(lidarDataDoc.toJson());

  }

}