Revert "Use bootstrap theme for Actor"

This reverts commit 10eedf08233e6cd40a5d8303f63a5b9bf42fab25.
Revert "Migrate Actor resource. Generate the twitter bootstrap application layout. Add a margin at the top"

This reverts commit 43f363a33b620c959785cce07524cd7f6d6ee299.
Revert "Creating Actor resource"

This reverts commit 036e76f28e936eee161bd56d65182cf130f194b5.
Add Active Model Serializers