Encoded strings are prefixed with "N", see issue #69: https://github.com/ServiceStack/ServiceStack.OrmLite/issues/69
(all sql server tests are still OK)
Prefix string values with 'N' only if UseUnicode == true
Updated UnicodeTests to set and restore UseUnicode to true.
String prefixing calls base.GetQuotedValue + indentation
Changed how prefixing is done.
Merge pull request #142 from AkosLukacs/master

Fix for inserting unicode string into MsSql