edje: Edje_Edit - add new feature edje_edit_image_compression_set.

edje: Edje_Edit - add new feature edje_edit_image_compression_set.

Summary:
Set compression type for the given image. Has object being edited,
the name of the image and Edje_Edit_Image_Comp(EDJE_EDIT_IMAGE_COMP_RAW,
EDJE_EDIT_IMAGE_COMP_USER, EDJE_EDIT_IMAGE_COMP_COMP,
EDJE_EDIT_IMAGE_COMP_LOSSY[_ETC1]) as in parametrs.
Return EINA_TRUE if successful, EINA_FALSE - otherwise.

Reviewers: cedric, raster, seoz, Hermet

Reviewed By: cedric

CC: reutskiy.v.v, cedric
Differential Revision: https://phab.enlightenment.org/D929

Signed-off-by: Cedric BAIL <c.bail@partner.samsung.com>