joeroe/rintchron: v0.1.0

Initial release, including: High level functions: intchron() queries databases indexed by IntChron. intchron_hosts() retrieves a list of available databases (hosts). intchron_countries() retires a list of available countries (optionally by host). Low level functions: intchron_request() and intchron_url() help construct requests to IntChron. intchron_crawl() recursively retrieves records. intchron_extract() and intchron_tabulate() help wrangle response data. Read and write functions: read_intchron_delim() for CSV and TXT/TSV files from IntChron Vignettes: vignette("rintchron") and vignette("intchron-api")