ensure '' entryPath for templateAdapter on client

without this when you instantiate your app with an entryPath (as we do in our
unit tests), it will fail client-side because the `clientEntryPath` is only
passed to the ClientRouter, but not to the templateAdapter
Added check to see if local backbone router can handle the route or not.
Merge pull request #196 from c089/ensure-empty-entrypath-for-template-adapter-on-client

ensure empty entryPath for templateAdapter on client
Merge pull request #197 from modalstudios/master

Added check to see if local backbone router can handle the route or not.
The try / catch is making me crazy

if the app_view in my app has an error, rendr quietly falls back to using it's own app_view.  Which is tricky to notice, as rendr's app_view does most of the work already.

But this is only a partial fix.  Getting the customAppView set on the app requires overriding the `initialize` method in the app's app_view, setting the `customAppView`, and then calling ` BaseApp.prototype.initialize.apply(this, arguments);` at the end of it.  I'm not thrilled about that as a solution, so I wanted to check in and get people's thoughts before adding a `preInitialize()` method, or if I'm missing a better way to get this into the base app.
adding a method to app to allow overriding of the app_view class
Merge pull request #195 from bigethan/custom-app-view

The app_view try / catch is making me crazy
Fix ClientRouter test

Broken by #195
Capture this for use in fetchFromApi error callback

When this file was modified for entryPath changes, this code path must not have been hit.
Guard against null getResponseHeader('content-type') in clientSync

From browser restrictions, jquery throwing a parseerror from malformed JSON, etc.
Merge pull request #201 from rcs/patch-1

Capture this for use in fetchFromApi error callback
Don't test 0.11 in Travis because of infra issues

Builds are always passing on 0.11. Travis says it is an issue with their
infrastructure and something they're working on.

It's not essential to test on an unstable Node version; when stable 0.12
is released, we should certainly add it.
Merge pull request #202 from rcs/patch-2

Guard against null getResponseHeader('content-type') in clientSync