A wee bit more detailed error message when not being able to calculate

.gitignore

nb-configuration.xml

nbproject/project.properties

pom.xml

...o/vips/model/bremialactucaemodel/BremiaLactucaeModel.java

...a/no/nibio/vips/model/bremialactucaemodel/DataMatrix.java

.../no/nibio/vips/model/bremialactucaemodel/texts.properties

.../nibio/vips/model/bremialactucaemodel/texts_nb.properties

...ps/model/bremialactucaemodel/BremiaLactucaeModelTest.java

src/test/resources/lier_2015.json