First public release

Changes to previous version:

• Added selection parameters for ggPSE()
• New ggPSE_profile() to plot alongside groups or periods identifying trends.
• Added interactivity using ggiraph
• Updated the license to MIT.
• Added a possible hierarchy for ggPSE_badge() and optional legend
• Added ggPSE_theme wrapper for ease of publishing
• ggPSE_save() for ease of use

Full Changelog: https://github.com/VJGeiger/ggPSE/commits/v0.2.0

This is still maturing! Thanks for trying it out!