Changes in version 0.2.0                        

  - Update Maintainer to Dr. Emi Tanaka
  - Refactored asreml integration #37, #32
      - Added var_comp.asreml() for extracting and assembling variance
        components for asreml model objects
  - Refactored H2() for asremlmodels so that it now takes arguments like
    marginal, stratification
      - Improved handling of vm() specification
  - Refactored H2_standard()
  - Compute confidence intervals for heritable objects #30