Extend and test fh-sync-js example

[wtrocki]

[damienomurchu]

started a little work on this in pr here - #10

mainly looking at:

• extending example to illustrate sync more clearly
• hook in with fh-sync server example - https://github.com/feedhenry/fh-sync/tree/master/examples/basic-express-example

@wtrocki let me know what you think

[wtrocki]

@damienomurchu are you working on this ticket? Assigned you.

As we agreed let's move example apps out of the js and sync librarries and keep them as separate repository. We may also get some getting started guide etc.

[damienomurchu]

@wtrocki working on this, should have assigned it to myself, thanks :)

re: example apps, think the client & server example code should be in the same repo, but that would mean putting the same code in both the fh-sync and fh-sync-js repos which raises the question - are we better off with one repo that would have fh-sync & all the client-adapter libs, ie fh-sync-js and the future fh-sync-ios & fh-sync-android?