Got rid of a bunch of uses of ParameterSanitiser
Got rid off AddBook's dependency on ParameterSanitiser
Got rid of parameter_sanitiser from AddBookType.
Remove parameter_sanitiser from GetBookType
Get rid of parameter_sanitiser from ListBooksByFirstLetter
Got rid of Parameter sanitiser. Fix #22. Should be the end of this branch.
Merge pull request #23 from jeroanan/sql-parameters

Fix #22