index function add

Signed-off-by: shyeon.kim <shyeon.kim@scipi.net>
removeObjectAtIndex function add

Signed-off-by: shyeon.kim <shyeon.kim@scipi.net>
Copyright messages reverted

Signed-off-by: shyeon.kim <shyeon.kim@scipi.net>
Merge branch 'release/v0.02'