[R-package] small change in documentation

[R-package] update tests to reflect recent changes

add cov_function = ‘linear’ (allows for doing Bayes linear regression…

… with empirical Bayes)

changes to surpress error on some compilers

bump version and small change

avoid error in 'CalcPredVecchiaLatentObservedFirstOrder' function on …

…some compilers

[R-package][python-package] changes in demos

bump version

make use of OpenMP conditional

[documentation] small change