fixing eo_do_str_get

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
added eo_add_str_get

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
Gui_Widget_Property added

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
...Added gui_value_set

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>
...refactoring

Signed-off-by: Yakov Goldberg <yakov.g@samsung.com>