Revised classes and interfaces in .eo files and added missing attributes

Revised classes and interfaces in .eo files and added missing attributes

Summary:
Some newly implemented attributes are not present in several classes and
interfaces.

This patch:
- Adds some attributes (like @nullable, @optional, own, free) to several .eo files.
- Changes some eina types names to the equivalent eolian name (like "Eina_Bool" to "bool")
- Adds the element type of lists and iterators.

Reviewers: felipealmeida, tasn

Reviewed By: tasn

Differential Revision: https://phab.enlightenment.org/D2350