SqlCmd variables and pre/post-deployment script support

This release added support for SqlCmd variables as well as pre- and postdeployment scripts to be included with the .dacpac.

Added LICENSE

Added a LICENSE to the NuGet package

First release

This is the first stable release of MSBuild.Sdk.SqlProj with support for the following:

• Defining database projects using SDK-style MSBuild project files
• Support for PackageReference to other packages that include a .dacpac
• Setting various properties for the model using MSBuild properties
• Packaging support using dotnet pack