Support more vector<> operations with array data

[mightypenguin]

Here's the full list:
http://www.cplusplus.com/reference/vector/vector/

Specifically, it's nice to be able to get the last element without having to do a size lookup every time.
rend(), rbegin(), front, back

insert, is hugely helpful if we have a need to sort members as we add them.
Currently inserting in the middle of an array requires moving all the elements after it one array index higher which can be expensive (which is what vector does for you though "list" and "forward_list" don't have that problem).