crul v1.0.0

ok related changes

• ok() can now accept more than 1 status code so that you can check if the status of a url is within a set of status codes rather than equal to 1 status code (#124)
• ok() gains a parameter verb to use either head or get requests. in addition added more documentation (#125) to the function on how to get the "right answer" for whether a url is ok/up (#123) (#127)
• ok() gains parameter ua_random, which if TRUE, will use a random user agent string pulled from a vector of 50 user agent strings generated from charlatan::UserAgentProvider (#138)

NEW FEATURES

• gains new async class AsyncQueue for doing async requests with rate limits (#139)
• gains new functions curl_verbose() and set_verbose(). curl_verbose() can be set by passing to the initialize step (e.g., HttpClient$new(url, verbose=curl_verbose())), and gets more compact verbose curl output, while also getting request body information (and response body optionally). set_verbose() is sets curl_verbose() globally (#141)
• gains new vignette "How to choose a client" for choosing which crul class to use (e.g., HttpClient vs. Async) (#133) (#143)

MINOR IMPROVEMENTS

• package sticker done, shown in README (#42)
• improve function/class reference page in docs site (#131)
• improvements to the best practices vignette (#132)
• removed unused private variable in the AsyncVaried class (#140)
• fix inaccuracy in documentation for the RETRY method (#130)
• HttpRequest now adds the query (if present) to the printed url in the print method for the class (it was absent before now) (#128)
• use new roxygen2 support for R6 classes (#126)
• removed delete-requests and post-requests manual files - mostly redundant with other documentation