Use getFragment instead of getHash to check for initial route match

[jtuulos]

This fixes SubRoute when using pushState. getFragment will fall back to getHash if pushState isn't supported

[geekdave]

Thanks for the contribution Jyri, and sorry for the delay! I've reviewed and tested your change and am merging it now.

[geekdave]

Thanks for reporting, @MMRandy . I'm reverting to getHash() for now.

@jtuulos , I won't have time to sort out the issue that MMRandy described for at least a few weeks. If you find a solution that allows lazy-loading of subrouters please let me know.

[ses4j]

Just weighing in -- I'm using backbone 1.9.0 with pushState in Chrome and getHash was crashing, but getFragment works okay. Can we just use something like this?

        if (Backbone.history.fragment)
            var hash = Backbone.history.getFragment();
        else
            var hash = Backbone.history.getHash();

Updating to backbone 1.9.2 obviates the need for this patch though.