Implement fetching data by automatically incrementing start parameter
(as fetching_fully() decorator).
Refactor the old way of following the cursor to fetch the entire response data
--- now a decorator (following_cursor())
Add "Low-level Interface to ISS" section to README.Rmd
Allow specifying date-times for from, till arguments of get_candles().
moexer is now able to download data for arbitrarily long time periods by
following the .cursor sections in the response
Minor code refactoring and bug fixes
Initial release.