Added ability to delete user trash files in all directories specified by the XDG Trash specification (not just the trash bin in the home directory); also fixed bug that would prevent the total deleted filesize to be shown correctly when --delete wasn't used
Made scanning other user trash directories (outside of the home directory) optional
Merge pull request #5 from alexander255/master

Added ability to scan mount points for .Trash directories.

This still needs some refactoring and we need to consider a min-free option that uses a percentage, because keeping 1 GB free on a 1GB USB memory stick makes no sense.