Added set and remove methods

Signed-off-by: Nate Brunette <n@tebru.net>
Implemented ArrayAccess

Using as a pass-through to already implemented functionality.

Signed-off-by: Nate Brunette <n@tebru.net>
Renamed project to MultiArray

I think this name is a better description of what the project is.

Signed-off-by: Nate Brunette <n@tebru.net>