Cleanup of $binlist behaviour. Show error when no programs are found. Don't use $countdown if only one program is available. Don't call clear when only one program is available/dialog is not called.
Check if directories exist before try to \'find\' files in them.
Add '/usr/share/xsessions' to comments as possible sessions location.
Merge pull request #23 from polyphemus/develop

Miscellaneous cleanup