ggspectra 0.1.2 (3rd preview: new package)

Renamed several methods to better reflect their functions.

Revised User Guide with explanations for all code examples and improved some of the code in the User Guide.

Please, report any problems you encounter, and suggest possible changes or additions to the functionality!

NOTE: Sources, and Windows binaries for R 3.2.x, are now available in the R-test repository.