Use pointer to Bounded Array instead of ArrayList

[gballet]

In #43 we decided to merge the PR in spite of its design issues, and the fact it wasn't future-proof.

What should be done:

• Use *BoundedArray instead
• Offer an ArrayList-backed List type for when the size of the object is too large and pre-allocating everything is too costly. This should eventually be deprecated.
• Convert ArrayList to whatever replaces it in 0.15.1

[chetanyb]

• Offer an ArrayList-backed List type for when the size of the object is too large and pre-allocating everything is too costly. This should eventually be deprecated.

when would this be deprecated(once implemented) and what would be the replacement?