prep for roxygenation
roxygenization

replaced all .R files with Rd2roxgen version (see output notes in inst/Rd2roxygenNotes.txt temporarily)

includes new file R/GeoLight-package.R
mods to data and description to run roxygenize
update README.md for RStudio build
stray boilerplate
Merge branch 'Rd2roxygen'

Conflicts:
	.gitignore