Question Editors and new build system.
- Change the build system
- Migrate from webpack v1 to v2 and as result remove gulp usage completely.
- Migrate from typings to @types.
- The Question Editors were introduced. It should improve the End-User experience greatly. The Question Editors are extendable. You may override any Question Editor or introduce a new one. If a developer decide to remove/hide a property, it is not shown in the Question Editors as well.
- Several UI improvements,for example: property editor text becomes clickable.
All known bugs were fixed.