Migrate to Angular 1.3 and take advantage of it's new features

[0x-r4bbit]

This mainly includes:

• [ ] Replace bind-once with one-time bindings
• [ ] Make use of ngModelOptions in search module (debouncing etc.)
• [ ] Remove sofa-lazy-validation directive and rebuild all forms using ngModelOptions
• [ ] Make custom filters stateful if needed
• [ ] Apply ES6 Style Promise syntax to make code cleaner (rather a nice to have)
• [ ] Disabling Debug Info in production app to get a performance boost for free
• [ ] Use controllerAs syntax whenever possible (Since this is considered a best practice. This has been introduced in 1.2 already)
• [ ] Bind to Directive Controllers in directives with isolated scope and get rid off linkFn where possible. This goes hand in hand with controllerAs.
• [ ] Make use of ngMessages directive for checkout and other forms
• [ ] Integrate features of newly introduced validation process
• [ ] Add ngStrictDI directive to application to be really sure we're on a safe side

I gonna update this issue over time with more things once I explored them.