moexer 0.3.0

• 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().