Upgrade dependencies and Ember to 2.13

[bjornharrtell]

Before

File sizes:
 - dist/assets/cargo-502d5135cd3fcd2b77d64b2027927750.js: 183.81 KB (22.55 KB gzipped)
 - dist/assets/cargo-ff8d7f4b30c09a6d7164b5b110300d4e.css: 19.43 KB (4.11 KB gzipped)
 - dist/assets/vendor-45cafdb0402c3bdc8ab00ba98c34b467.js: 1.14 MB (285.66 KB gzipped)
 - dist/assets/vendor-924cc62bda01ca298267563aa0a649b0.css: 2.11 KB (969 B gzipped)

After

File sizes:
 - dist/assets/cargo-2f40149c023ece6c841fe2262c0b87c1.js: 155.18 KB (21.44 KB gzipped)
 - dist/assets/cargo-ff8d7f4b30c09a6d7164b5b110300d4e.css: 19.43 KB (4.11 KB gzipped)
 - dist/assets/vendor-378639b713e879bbf548e26dfed52167.js: 1.19 MB (292.47 KB gzipped)
 - dist/assets/vendor-cbfb16fd993fc7bc10c973ed8ad19ca2.css: 2.02 KB (934 B gzipped)

[bjornharrtell]

Ready for review :) Ping @carols10cents and @alexcrichton.

[carols10cents]

@bjornharrtell thanks!! I'm sorry I've let this sit so long, I'll try and take a look at this soon, hopefully in the next few days.

It looks like travis is failing though, could you also take a look at that? I'm seeing:

• A deprecation warning: DEPRECATION: Ember.MODEL_FACTORY_INJECTIONS is no longer required [deprecation id: ember-metal.model_factory_injections] See http://emberjs.com/deprecations/v2.x#toc_code-ember-model-factory-injections for more details.
• A search test failing with undefined is not a function

Thanks!

[bjornharrtell]

Will take a look but away until next week.

[carols10cents]

No problem!

[carols10cents]

Replaced by #760!