v0.5.0

UncertaintyQuantification v0.5.0

Diff since v0.4.0

Closed issues:

• Replace Sampleable{Univariate} with UnivariateDistribution (#91)
• Simple ParallelModel (#95)
• Multiple ExternalModel (#99)

Merged pull requests:

• Add ParallelModel (#96) (@FriesischScott)
• Add convenience methods for rvs (#97) (@FriesischScott)
• Add multiple outputs for the evaluation of Sobol indices (#98) (@andreaperin)
• Allow running of external models in same working directory (#100) (@FriesischScott)