getopt 1.19.1
=============
* If a passed in option matches multiple options in the getopt specification but matches one exactly
  then `getopt` now uses that value instead of throwing a "long flag is ambiguous" error.

getopt 1.19.0
=============
* Exports new function `get_Rscript_filename` that returns name of calling script,
  `getopt` now uses this function value as default for `command` argument
* Documentation improved and now highlights differences 
  between `getopt` and `optparse` packages for new undecided users
