[FIX] OPW 591344 : internal reports don't show images

Cleaner method, and shows images.
[MERGE][FIX] OPW 591344 : internal reports don't show images

Cleaner method, and shows images.
[FIX] web: on record reload (form & list view), use search_read instead of read, to check if the user can still read the record (security rules)
Merge branch 'bzr/openobject-server-7.0'
Merge branch 'bzr/openerp-web-7.0'