- DataTypeAttribute updated to work with v7 PropertyEditorAlias-based model
- UmbracoCore.7.0.0 used
- .NET Framework retargeted to v4.5  to use Umbraco v7.0.0
build of test projects fixed: retargeted to .net 4.5
Merge pull request #21 from VladimirLevchuk/feature/DataType-sync-v7

This fixes spopovic/uSiteBuilder#15