JustifieR edition

In this release, we have added 4 new functions to help "justify your alpha" (optimal_alpha, ANOVA_compromise, p_standardized, alpha_standardized). Further, ANOVA_exact2 has been created which mimics ANOVA_exact, but instead of creating an exact dataset it calculates the standardized effect sizes from a larger sample size then back calculates power for the provided N. This removes the sample size limitations/issues associated with the original ANOVA_exact function. In addition, S3 methods have been created for ANOVA_design, and simulation results (ANOVA_exact and ANOVA_power).