Merge pull request #123 from dmcdougall/sep_impl_vectormdf

Separate implementation VectorMdf
Add separate implementation of VectorRealizer
Add separate implementation of BetaVectorRealizer
Add separate implementation of ConcatenatedVectorRealizer
Add separate implementation of GammaVectorRealizer
Add separate implementation of GaussianVectorRealizer
Add separate implementation of GenericVectorRealizer
Add separate implementation of InverseGammaVectorRealizer
Add separate implementation of LogNormalVectorRealizer
Add separate implementation of SequentialVectorRealizer
Add separate implementation of UniformVectorRealizer
Add separate implementation of WignerVectorRealizer
Add make rules for new VectorRealizer files
Fix up header includes
Remove conflict markers
Fix whitespace in licence
Fix up another header include