Add license file
Add NEWS file
Add files to .Rbuildignore
Add more informative description
Add check that 'initialize' must be public
Tweaks to CSS for vignettes
Edits to introduction vignette
Rename createR6Class to R6Class
Change class from 'R6Class' to just 'R6'
Edit to help page
Merge remote-tracking branch 'origin/master'

Conflicts:
	.Rbuildignore
	LICENSE
	R/r6_class.R
	man/R6Class.Rd
	vignettes/Introduction.Rmd