clipr 0.2.1

• Introduces read_clip_tbl, a convenience function that takes tab-delimited
  text from read_clip (such as that copied from a spreadsheet) and parses it
  with read.table. Thank you to Steve Simpson (@data-steve) for the original PR.
• write_clip(object_type = "table") has a new internal implementation (writing
  to a temporary file rather than using capture.output) which should
  dramatically shorten the time it takes to write very large tables to the
  clipboard. Thank you to @r2evans for this suggestion.