Merge pull request #243 from mintsoft/RegexCheatSheet

RegexCheatSheet.pm: adding support for simple character classes
Dessert: Zepolle changed to Zeppole
Dessert: Fixed misspellings and removed non-desserts.
Dessert: Changed "Honeycomb" to "Hazelnut Torte".
Sudoku.pm: cleaning up based on: https://github.com/DrDub/zeroclickinfo-goodies
Sudoku.pm: Simplifying handling and functionality
Sudoku.pm: slurping stylesheet instead of heredoc
Sudoku.pm: Fixing maxlength on input boxes