native iOS localStorage

[ggendre]

The iOS localStorage uses the real web localStorage. This worked well so far. But we decided that every Cobalt feature should be usable from the native side too.

Even if some succeed to access to the webkit localStorage this may be not the good solution. We need to have a real key/value database behind the localStorage. As we did with a sqlite database to fix the Android localStorage.

• update the web code to proxy localStorage access
• create an iOS database
• handle web calls to storage and reply
• test it with the Catalog tests

think that those functions will be available from the native side too. we have big plans for apps storage ;)