Clean up get() calls, remove commented out code

@Ignat99 PTAL.

As suggested by @dionyziz at https://github.com/OpenBazaar/OpenBazaar/pull/658#issuecomment-56653243 I created a PR out of my own code-review comments.
@Ignat99 These are mostly style changes except for one bug (https://github.com/OpenBazaar/OpenBazaar/pull/658/files#r18121676).  Please accept my contribution.  We are all trying to help here, like you are.

Otherwise, @Renelvon, @hoffmabc, should I do new PR directly against OpenBazaar:develop?