fix SQL Server default constraints
fix SQL Server composite foreign keys
Merge pull request #299 from deeky666/fix-sql-server-composite-foreign-keys

Fix list SQL Server composite foreign keys
Merge pull request #298 from deeky666/fix-sql-server-column-default-value-alteration

Fix SQL Server default constraints
improve list SQL Server table indexes
Merge pull request #300 from deeky666/improve-sql-server-list-table-indexes

Improve list SQL Server table indexes