Fixes 'No migrations configuration type was found in the assembly' error when enabling migrations.
EntityFramework's Enable-Migrations cmdlet builds the project and then checks the generated
assembly for the configurations class that it added.
Enable-Migrations now works.
Files added (e.g. T4MVC.tt) when installing a NuGet package were not getting a default CustomTool configured.
Now the CustomToolsService.GetCompatibleCustomToolNames() is used to find the first matching custom tool name for a file.
Save solution when:
1) EnvDTE.Solution.Globals.VariablePersists is set to true.
2) An existing solution item is changed by EnvDTE.Solution.Globals.VariableValue.
Daniel Grunwald
Matt Ward