Initial release

Support custom write buffer, output size and both file / standard outputs.

Usage: dollop [-hV] [-l STRING] [-b <n>] [-o <file>]

Creates files with pseudo-random content (dollop). Generated content
is sent to standard output, unless an output file is given.
Invalid lengths will be treated as 0.

  -h, --help                display this help and exit
  -V, --version             display version info and exit
  -l, --length=STRING       final file length in bytes, default 1k
  -b, --buffer-size=<n>     write buffer size in bytes, default 4k
  -o, --output=<file>       output file, defaults to console

Report bugs to <https://github.com/RobertoMachorro/dollop/issues>.
Dollop home page: <https://robertomachorro.github.io/dollop/>.