Release diffviewer 0.1.0

[hadley]

Prepare for release:

• Check that description is informative
• Check licensing of included files
• Need alternative for csv2array (Find alternative to CSV to array #7)
• devtools::build_readme()
• usethis::use_cran_comments()
• devtools::check(remote = TRUE, manual = TRUE)
• devtools::check_win_devel()
• rhub::check_for_cran()
• Update cran-comments.md
• Review pkgdown reference index for, e.g., missing topics

Submit to CRAN:

• usethis::use_version('minor')
• devtools::submit_cran()
• Approve email

Wait for CRAN...

• Accepted 🎉
• usethis::use_news_md()
• usethis::use_github_release()
• usethis::use_dev_version()
• Update install instructions in README

[hadley]

@jbkunst I just submitted to CRAN, so if you need to make any changes, can you please do so via PR? (I'm submitting this early because the first submission always takes a little longer. My expectation is that we'll probably do a 0.2.0 release as well, but that will be fast because it should go through the CRAN robot).

[hadley]

On CRAN!