Fixed an issue where strong typed helper methods would not generate valid SQL for column names if the poco didn't explicitly set a [Column(Name="")] attribute. The PetaPoco format allows for this though and will default to the property name. Again this would cause issues for developers trying to use the DatabaseContext.Database class with their own Poco's.
Both the above causes would happen for example if using the PetaPoco T4 templates to automatically generate Poco's.
The logic would produce incorrect syntax.
Fixed the default string column for sql server, made them all consistent.
Moved ctor logic for shared sql syntax providers to the base class.
Created formatted Decimal column definitions so that a custom precision/scale works.
Set the migration to use the default precision/scale values.
Removes the pattern validators because they don't do anything... due to the fix-number directive which has it's own issues but we won't solve those now.
