Made PackageContainer pick the newest supported framework for the packages. Could fix #185
Added filter on .NETFramework
Merge branch 'dev' into fix-package-references
Removed possible NullReferenceException on newestFramework
Merge branch 'dev' into fix-package-references
Merge branch 'dev' into fix-package-references
Fixes #201. PowerArgs updated to 1.5.0.0
Merge pull request #202 from denis-mentey/dev

PowerArgs updated
Merge pull request #187 from khellang/fix-package-references

Pick the newest supported framework for the packages to restore
Merge branch 'dev' into fix-r-directive