Merge pull request #410 from miiihi/master

Querying DB with conditions on Flags enum fields fails
Update SS.Text dlls
Add support for EnumFlags in SqlExpression
Upgrade tp Npgsql 2.1.3 and Sqlite.Core 1.0.93.0
Use the correct parameterized type for enum flags
Fix Sql Server windowing function when used in Tables with references
Add new APIs for db.ColumnLazy
Update SS dlls
Update SS.Text
Add Generic version of db.TableExists<T>()
Update SS dlls
Update SS Interfaces
Update common dlls
Update common dlls
Update common dlls
Update dlls
Update common dlls
Add GetSequenceName to INamingStrategy
Update SS dlls
Upgrade to Npgsql 2.2.0