Page generator should validate content block attributes

[mitramejia]

As described in the docs, some attributes on Fae::Page are invalid names for content blocks. These attributes are:

1. title
2. slug
3. position
4. on_prod
5. on_stage
6. created_at
7. updated_at

Using rails g fae:page page_name title slug position should raise an error to avoid generating a page with invalid attributes.

[jamesmk]

Thanks for the suggestion @mitramejia. I'm looking to make improvements on static pages in v2.0 and have been thinking about the attributes' usefulness. I'd like to deprecate slug, on_prod and on_stage, and then rename title to something more obscure. These changes should make name clashing more rare. While I'm in there, I'll see what something like this would take.

[Spone]

@jamesmk my 2 cents: I think it's a good idea to deprecate slug, as it's trivial to add this behavior with http://norman.github.io/friendly_id/