Fixed FxCop: CA1709: Identifiers should be cased correctly: XMLSerializer renamed to XmlSerializerHelper
Fixed FxCop: CA1804: Remove unused locals: Removed 2 unused local variables
Fixed FxCop: CA1726: Use preferred terms: renamed Login to Logon
Fixed FxCop: CA1024: Use properties where appropriate

* Renamed GetAllAccounts to RetrieveAllAccounts
* Renamed GetTransactions to RetrieveAllTransactionsFromAccount
Fixed FxCop: CA1305: Specify IFormatProvider

* Added tools method RetrieveCultureInfoFrench
* Added this to account and transaction classes
Fixed FxCop: CA1304: Specify CultureInfo
Fixed FxCop: CA1822: Mark members as static
Fixed FxCop: CA1053: Static holder types should not have constructors
Fixed FxCop: CA1702: Compound words should be cased correctly
Fixed FxCop: CA1026: Default parameters should not be used
Fixed FxCop: CA1031: Do not catch general exception types
Fixed FxCop: CA1045: Do not pass types by reference
Fixed FxCop: CA1020: Avoid namespaces with few types
Fixed more FxCop and style rule errors