Simpler and safer handling of non-valid jsons

[stropitek]

No description provided.

[stropitek]

See #27

[tsironis]

This does not work as expected because the localStorage value can be a serialized JSON. I think we need to encode the values before persisting to localStorage, then decode, then parse as the json string.

[stropitek]

I don't really understand. It seems you are implying that JSON.parse could fail on a serialized JSON, since the part I change is only in this case. What do you mean then by serialized JSON?

[tsironis]

@stropitek sorry, my bad! Yes, it seems that this will work just fine. Can you add a test case for this please?

[stropitek]

Yes, I will do that

[tsironis]

Awesome!

[stropitek]

Done. For info your test script does not work with node v5. I had to use v4. Probably your dev dependencies are outdated. It seems to be the grunt-contrib-jasmine package that causes the issue.

[tsironis]

Absolutely wonderful. Also, I bumped the devDependencies and now grunt runs as expected (node v5.3.0).

Thank you for your contributions!