[feature] Add possibility to download result files of the script

[bugy]

Some scripts can create file(s) as a result of execution. There should be a possibility to download these files.

[bugy]

Have implemented the first version of download feature. Now admins can specify list of files in script json file, which should be available for download after script is finished.
Files can be specified as a path (with * and ** wildcards), or can be specified as a regex (use # at the beginning to treat file as a regular expression) for find matches in script output (if file path is dynamic and unknown in advance).
Downloadable files are copied into temp folder and are accessible only by the user, who run the script. Temp folder is cleaned after 24 hours.

Should be tested on real environment and also on Windows

[bugy]

Tested on WIn and also made couple of fixes