Add extra distinct test

Fix setting type of DbNull

Move check for dynamic object to top of IsNew method

Fix SqlExpressions for nullable enums

Make CreateCommand and AddParameter public and add to IDatabase inter…

…face

Remove missing file from csproj

Make SqlBulkCopyOptions available to BulkInsert helper

Make dynamic queries use PocoExpando which is case insensitive

Fix inherited type properties to emit the correct SQL

Fix paging to support sqls