Update cran comments

Fix broken news

Ignore CRAN-RELEASE

Update CRAN comments and version for next release (r-lib#96)

* Update cran-comments.md

* Update scales version to 0.5.0

* Less detail on revdeps in cran comments

* Update CRAN comments

DiagrammeR is fixed, so only one package has an issue now

Prepare for release

CRAN release

Missing new import

Reformat news

Bump version

Release 0.2.3 of scales