hyper2 3.1-0

• consistent handling of non-zero-sum powers

hyper2 3.0-1

• better behaviour for rp()
• improved documentation

hyper2 3.0-0

• implementation of hyper3 functionality
• new vignettes

hyper2 2.0-3

• improvements to docs
• bugfixes

hyper2 2.0-2

• implement alabama::constrOptim.nl() as an alternative to base::constrOptim() to avoid wmmin bug