LexisPlotR 0.4

• Many minor improvements.
• Unified functions and arguments, changed function naming scheme from lexis.grid() to lexis_grid().
• Set legacy functions to .Deprecated.
• New feature: lexis_lifeline() now lets start and end lifelines at arbitrary points in time.
• New feature: lexis_polygon() can draw arbitrary polygons inside a Lexis grid.
• Improved support for HMD Lexis Triangle data.