Untested: Resolve "Move "FileReaper" from hackport to its own library"

Bug

Closes #40 (closed)

Changes

Moved code from hackport.src to filereaper.src
Rewritten code from filereaper to be stored in a filereaper object rather than the global scope
Added default empty methods in FileReaper (overwritten by hackport)
New feature : Added shell support

Checks

I have verifed the following:

• Fixes the issue
• Does not introduces an obvious bug or vulnerability
• Code has been duely tested
• Follows the coding style