Added .NET 6.0/8.0 targets and a strong name.

Updated the project to target .NET 6.0/8.0.
Reintroduced assembly signing back into the project.

Added ColumnNameComparisonMode (jonataspc).

You can now specify a StringComparison value to dictate how a column name is looked up.

Request Read Lock Only on Open, Updated to MIT

Request only read access when opening a file.
Updated the license to MIT.

Added support for .NET 4.5.2, .NET 4.6.1

Added new target frameworks for .NET 4.5.2, .NET 4.6.1
Added Readme.md.