refactor(components): update to use shadow DOM and work with css variables

- updates components to use shadow DOM or scoped if they require css variables
- moves global styles to an external stylesheet that needs to be imported
- adds support for additional colors and removes the Sass loops to generate colors for each component
- several property renames, bug fixes, and test updates

Co-authored-by: Manu Mtz.-Almeida <manu.mtza@gmail.com>
Co-authored-by: Adam Bradley <adambradley25@gmail.com>
Co-authored-by: Cam Wiegert <cam@camwiegert.com>

.gitignore

@@ -49,3 +49,5 @@ demos/src/**/*.ngfactory.ts
 demos/src/**/*.d.ts
 demos/src/**/*.metadata.json
 demos/src/**/*.css.shim.ts
+core/css/
+angular/css/