Cross-Domain Storage Solution

[iamnewton]

We know that we're going to have to store the interest groups and auction data within a Cross-Domain Sharing solution, but the specifics of that are not yet determined.

Should we use localStorage, or sessionStorage, or indexedDB, or something else?

And depending on the answer to that question, do we store in JSON?

[brodrigu]

This article provides a great high-level overview of available options.

It seems like indexedDB is most obvious starting point due to its asynchronous nature, support for transactions, and much larger storage capacity.

[iamnewton]

Based on #18, we're going to go with IndexedDB.