Core project no longer depends on FSharp.ViewModule
Add NuGet target to build script
Merge remote-tracking branch 'upstream/master' into nuget-package
Correct build script and publish initial NuGet package

It is available at
https://www.nuget.org/packages/FSharpVSPowerTools.Core/.
Merge pull request #551 from dungpa/nuget-package

Prepare a Nuget package
fix navigate to out of range exception
Merge pull request #554 from vasily-kirichenko/fix-navigate-to-out-of-range-exn

fix navigate to out of range exception
Fix regex bug

Wrong parenthesis
Add one more test
Merge pull request #555 from OkayX6/fix-smart-tag-bugs

Fix regex bug
decrease Unused color category priority below every other one except Other
fixed: SyntaxConstructClassifier grays out records, DU and DU cases even though they are used somewhere
move Unused symbols classifier logic to Core project (not all tests pass yet)
fix Colorizer tests, add some for Unused category
add more tests for Unused color category