Merge branch 'randomvarhelper' into 'develop'

tools.descartes.dml.mm.applicationlevel/META-INF/MANIFEST.MF

tools.descartes.dml.mm.applicationlevel/plugin.xml

...vel/functions/commands/AbstractRandomVariableCommand.java

...icationlevel/functions/commands/CalculateMeanCommand.java

...ionlevel/functions/commands/CalculateVarianceCommand.java

...applicationlevel/functions/util/RandomVariableHelper.java

...unctions/util/tests/AbstractRandomVariableHelperTest.java

...plicationlevel/functions/util/tests/BoxedPDFMeanTest.java

...ationlevel/functions/util/tests/BoxedPDFVarianceTest.java

...functions/util/tests/ExponentialDistributionMeanTest.java

...tions/util/tests/ExponentialDistributionVarianceTest.java

...pplicationlevel/functions/util/tests/LiteralMeanTest.java

...cationlevel/functions/util/tests/LiteralVarianceTest.java

...evel/functions/util/tests/NormalDistributionMeanTest.java

.../functions/util/tests/NormalDistributionVarianceTest.java

...mm/applicationlevel/functions/util/tests/PMFMeanTest.java

...pplicationlevel/functions/util/tests/PMFVarianceTest.java

...applicationlevel/functions/util/tests/ReplayMeanTest.java

...icationlevel/functions/util/tests/ReplayVarianceTest.java

...l.mm.applicationlevel/testfiles/boolean-literal.functions