blogdown 0.20

BUG FIXES

• Now blogdown::install_theme() downloads Hugo themes (from Github by default) as tarballs instead of zip archives, because unzip() is unable to extract files for certain themes (thanks, @jimvine, #433).

• Disallow running blogdown::serve_site() multiple times in the same R session due to an RStudio IDE issue (thanks, @jennybc @daczarne @denizCvrl @lopierra, #404).