String: Docs for the new Unicode/bytes related keywords.
String: Docs for the new Unicode/bytes related keywords.

Update issue 1353
Documented new keywords.

ldtri0209/robotframework,fiuba08/robotframework,fiuba08/robotframework,ldtri0209/robotframework,waldenner/robotframework,waldenner/robotframework,waldenner/robotframework,waldenner/robotframework,ldtri0209/robotframework,fiuba08/robotframework,fiuba08/robotframework,fiuba08/robotframework,ldtri0209/robotframework,ldtri0209/robotframework,waldenner/robotframework