CRAN release 0.1.0

• dat_install(): Install Dat binaries
• ACTION_dat(), where ACTION is replacable with:
  • clone => create local copy of Dat filesystem
  • create => interactively create a Dat filesystem in working directory
  • share => initialize Dat filesystem (without metadata) and synchronize
  • sync => restore synchronization of working directory with Dat network
  • pull => update local copy of Dat filesystem remote updates
  • log => show the append-only log of the working directory Dat
  • status => show information about Dat filesystem (link, size, version)
• install_dat(): Install an R package hosted on the Dat network
• RStudio does not like interactive system calls, which this package is based on (see also issue #8). Beware!

Note: Maintainer forgot to push updates to Git before submitting to CRAN 🚶‍♂️ Release says based on different commit, but is this one. Sorry!