(#552) rudimentary app testing, took more localstorage out

How to test the functionality for Chrome Apps. Two options:
A. You want to test the tests which use eval() in some way shape or form
1. Install a version of Chrome that's before when they took the legacy stuff out
[Here](https://developer.chrome.com/extensions/apps.html)
2. Go to chrome extensions, enable developer mode, install the package app from the pouchdb directory. Run the app. This brings up test.html, the web runner.
B. You don't mind that all the tests which use eval() in some way shape or form fail
1. Change the manifest_version in manifest.json to 2, instead of 1 which it currently is
2. Go to chrome extensions, enable developer mode, install the package app from the pouchdb directory. Run the app. This brings up test.html, the web runner.

Eventually, all this can be put in a sandbox somewhere.