So. Very. Close.

Needs tidying up (comments, console.logs, etc) but more importantly, for some reason when you are in the file details for a file in the root of the hive… the menu button does not change to a back button.
Fixed the back button issue.
Provide for accounts that lack a SpiderOak Hive folder:

* If the account's content lacks a 'syncfolder', indicate in the hive
  model object that the hive is absent.
* If the hive model shows that the hive content is absent, inhibit the hive
  presence in the UI, pushing the devices view as the default, instead.

There may be better ways to inhibit the hive UI artifacts, but the presence
of the hive in the UI now depends on whether or not the account has it.
If the hive is present, ensure that the initial Hive view replaces the
devices view on the stack, if the devices view happened to sneak in first.

Also, use .accountModel.get("isLoggedIn") instead of ...get("b32username")
to determine logged-in-ness.
Fixes issue for users that do not have Hive
Merge pull request #135 from SpiderOak/spideroak-hive

SpiderOak hive

Fixes #105