Initial release. Exported functions:
read_rprof(path, ..., version = "1.0") and
write_rprof(x, path) for reading files generated by
Rprof() and writing compatible files.
read_pprof(path, ..., version = "1.0") and
write_pprof(x, path) for reading and writing files understood by
validate_profile(x) for validating profile data, called by the readers and writers.