Jackcess 2.1.7 released

Jackcess 2.1.7 Release

• Implement support for partial index lookups. Efficient IndexCursor lookups can now be done with multi-column indexes using only some of the columns in the index
• Cover the GENERIC_JET4 format in unit tests, thanks to Gord Thompson
• Allow inserting negative auto number fields, thanks to Gord Thompson
• Add CustomLinkResolver which facilitates loading linked tables from files which are not access databases