The major change from version 0.5.x (which never made it to CRAN) is a swap out of the reticulated
docker package with the pure-R
stevedore package which will make it loads more compatible across the landscape of R installs as it removes a somewhat heavy dependency on a working Python environment (something quite challenging to consistently achieve in that fragmented language ecosystem).
Another addition is a set of new user agents for Android, Kindle, Apple TV & Chromecast as an increasing number of sites are changing what type of HTML (et. al.) they send to those and other alternative glowing rectangles. A more efficient/sane user agent system will also be introduced prior to the CRAN. Now’s the time to vote on existing issues or file new ones if there is a burning desire for new or modified functionality.
Since the Travis tests now work (they were failing miserably because of they Python dependency) I’ve integrated the changes from the 0.6.0 to the master branch but you can follow the machinations of the 0.6.0 branch up until CRAN release.