v1.1.2

• Add three colour schemes: Paul Tol’s hight contrast (qualitative), iridescent (sequential) and modified colour scheme for the AVHRR global land cover classification.
• Add three ggplot2 scale functions: scale_*_contrast(), scale_*_iridescent() and scale_*_land().
• The function scale_*_tol() is removed.
• The function arrange() is removed.