Cleaner: improved matchMask()

[janpecha]

• bug fix? no
• new feature? yes

Cleaner currently supports $ignoreMasks only for files & directories from root of package directory. This PR improves matchMask method and adds support for more complex masks. See Cleaner.clean.phpt for example.

Features:

• possibility to ignore only specific items in subdirectories
• possibility to delete items from ignored directories (directories from autoload key in composer.json, etc.)

(Methods collectPaths & matchMask are taken from ftp-deployment, collectPaths is little modified)

PR partially solves issue #13.

[janpecha]

@dg What do you think about this?