srvyr 0.1.2.999

Added support for database backed surveys, using dplyr's handling of DBI. Because of problems interacting with the survey package twophase designs do not work.

srvyr 0.1.2

Fixed a problem with confidence levels not being passed into quantiles
Added deff parameter to survey_mean(), survey_total() and survey_median(), and a df parameter to those functions and survey_quantile() / survey_median().
summarize and mutate match dplyr's behavior when arguments aren't named (uses dplyr::auto_name())

New function cascade summarizes groups, and cascades to create summary statistics of groups of groups.
Fixed a bug for confidence intervals for survey_total() on groups.
Fixed some issues with the upcoming version of dplyr.