First step to parallelism

[didactic-drunk]

Commands are redirected to a file instead of buffered in memory
Allows running commands with large output

Commands run with their own resized pty
Preserves colors when outputting to a file
Fixes command formatting when indenting 2 spaces

Queue tasks instead of running immediately (also necessary for future parallelism)
Possibly fixes #14

Use Set to avoid infinite adding to @files/@Runners when files created/deleted

Allow configurable behavior of how to handle missing files
Defaults to remove missing files from command args
Possibly fixes #4

Run single command with cmd file1 file2 instead of 1 command per file

Output has changed
Hide successful command output
Show error output

--verbose option

Fix gitignore

[didactic-drunk]

Restructuring with output to files, queuing, additional pty's is all necessary to run tasks in parallel.
If output directly to a file color information is lost.