randomFieldStationarity as boolean
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Merge pull request #105 from cmaumet/TrueFalseStationarity

Boolean value for randomFieldStationarity attribute
Use Preferred file name as discussed in #107
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DesignMatrix preferred filename
MaximumIntensityProjection preferred filename
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Merge pull request #116 from cmaumet/preferredFilenames

Merge: Use preferred file names for nifti exported as part of NIDM-Results