Working angular 7, issues with rxjs

[torabian]

Since we want to migrate fully to @ng-dashboard/core before Jan 2019, application will be updated to use @ng-dashboard/core instead of it's own layout. Layout components will be removed.

@ng-dashboard/core needs more work, such as in navbar. Those changes must be published and then we can merge this request.

Our goal is to take this repository into a private repo, and publish shared modules into @ng-dashboard/core repo instead.

Changes

• Angular 7 will be used
• @ng-dashboard/core will be used, and layout and menu will be removed.
• login, signup and authentication packages will be removed.
• environment production will target pixelplux.com, and this repository will be promoting @ng-dashboard/core
• Documentation will be removed soon, and will be placed on pixelplux.com/iot