Re-organise directory structure into new github/r-forge workflow: cleanup
Fix CRAN checks for R >= 3.0.0
Merge branch 'release/1.5.5'
Fix check error: do not use more than 2 cores in examples and vignettes
Change maintainer email address and add dependency to pkgmaker 0.20
Update vignettes
Add github URLs in DESCRIPTION file
Merge branch 'release/1.6'