Merge pull request #61 from diogro/master

Few tests and new default number of permutations in MantelCor
More mac stuff
Merge pull request #62 from diogro/master

Generic Repeatabilities functions, using comparison as argument
Merge pull request #63 from diogro/master

Added MatrixCompare for quick checks
Merge pull request #64 from diogro/master

Added last commit to DESCRIPTION
Adding Matrix Riemann Distance function