Added Eager Load, first stage -> based on Granada

Signed-off-by: Erik Wiesenthal <erikwiesenthal@gmail.com>
Update README.markdown
Update README.markdown
Merge branch 'master' of github.com:Surt/Paris

Conflicts:
	eager.php
Merge branch 'master' of github.com:Surt/Paris
Added eager.php to paris.php

Signed-off-by: Erik Wiesenthal <erikwiesenthal@gmail.com>
Changed find_many in Paris to return resultSet if Idiorm decides.
Changed find_many to return the resultSet or array with keys = id attributte of the model.

Note: eager loading returns relationships in array way, no resultSet.
Changed Paris set method to admit an array of properties=>values
Multiple assignements to properties was already included in paris/idiorm
update was already added to the Model and the ORM
Added basic/preliminary tests for eager load