sparklyr 0.5: Livy and dplyr improvements

This is a companion discussion topic for the original entry at

We’re happy to announce that version 0.5 of the sparklyr package is now available on CRAN. The new version comes with many improvements over the first release, including:
Extended dplyr support by implementing: do() and n_distinct().
New functions including sdf_quantile(), ft_tokenizer() and ft_regex_tokenizer().
Improved compatibility, sparklyr now respects the value of the ‘na.action’ R option and dim(), nrow() and ncol().
Experimental support for Livy to enable clients, including RStudio, to connect remotely to Apache Spark.