ropensci/bomrang: Christmas Island

Bug fixes resolves the group_by issues of #105 reported by Blundys Adds skip_on_cran() to some tests causing failures in CRAN checks that should not have been tested on CRAN Fixes bug in functions returning [data.table] objects that don't print to console Fixes bugs that removed station locations from internal lists being distributed with bomrang and when user updated them on their own machine Minor changes Prebuild main vignette with examples depending on Internet connection, which allows for example output to be displayed for more function