fixing issue #808

[maksimbormot]

Fixes #808

[maksimbormot]

@fzaninotto Please check the error (https://travis-ci.org/marmelab/ng-admin/builds/130531626#L879)

[fzaninotto]

please include this in your user gitignore, this has nothing to do in a project gitignore

[jpetitcolas]

These changes may have some drawbacks. Indeed, some API may expect all the entity fields in the request payload, even the non-editable ones. Yet, as far as I understand your PR, you do not send non editable fields anymore.

That's a big BC break, and I am not sure we handle it properly. A better way would be to retrieve the original entry values and to set them back to the API.

Let's postpone it to another version than the 1.0.