Fixed bug in if conditions from embedded script tagging.
Renamed MSBuild task option
Fix bug with InSchema() when deleting columns.
Fixed was not generating new ScriptsInNestedDirectories() call.
Fix: MigrationExtension: Now extends from MigrationBase to work for AutoReversingMigration
renamed to match Expressions/ExecuteEmbeddedSqlScriptExpressionTests.cs
Added unit tests and fixes for ExecuteScriptsInDirectoryExpression.
minor renames on unit tests