because of RStudio
Added R and RStudio cookbooks and roles, removed hadoop/hive/hue to speed up testing
Added R package installation to the roles/r.rb
Added shiny installation to rstudio role
Fixed problem with role_list's in r and rstudio roles
Added R and RStudio installation

Merge branch 'dev-r'

Conflicts:
	.gitignore
	Berksfile
	packer/data-master.json