Download command accepts multiple files and lists

[codecov[bot]]

Codecov Report

Merging #38 (35ef0ab) into develop (c26b532) will increase coverage by 14.54%. The diff coverage is 43.67%.

:exclamation: Current head 35ef0ab differs from pull request most recent head e815930. Consider uploading reports for the commit e815930 to get more accurate results

@@             Coverage Diff              @@
##           develop      #38       +/-   ##
============================================
+ Coverage    44.75%   59.29%   +14.54%     
============================================
  Files            8        8               
  Lines          362      425       +63     
============================================
+ Hits           162      252       +90     
+ Misses         190      149       -41     
- Partials        10       24       +14     

Impacted Files	Coverage Δ
error.go	100.00% <ø> (+21.42%)	:arrow_up:
cmd/pd/command/download.go	50.50% <42.02%> (+50.50%)	:arrow_up:
pixeldrain.go	70.00% <50.00%> (-30.00%)	:arrow_down:

... and 1 file with indirect coverage changes