Streamlining the transformation of margins from original to Laplace/Gumbel and back.  Information with distribution functions and inverses now held in margins part of dependence item in object of class mex (similarly bootmex,...) added tests for this in test.mexDependence.R
Fixed test to accommodate new implementation of marginal transformation in mexDependence function.
Merge branch 'master' of https://github.com/harrysouthworth/texmex