Mainly changes with a view to submitting to CRAN.
download_model() verifies the size and MD5 checksum of
a model downloaded from the default URL, deleting it and failing if
either does not match.download_model() now saves the model to the user cache
directory (tools::R_user_dir("dawnn", "cache")) by default.
Other functions updated accordingly.download_model() reports an unreachable URL with an
informative message, and no longer leaves the timeout
option modified if a download fails.run_dawnn() no longer alters the global random number
generator state.verbosity of run_dawnn() is
now 1 rather than 2, so the progress output of the underlying
predict() calls is suppressed by default.CITATION file, and package
URLs.alpha parameter was not being
respected (the default value of 0.1 was always being used).