Large App modal with all configuration options

This exposes all API values as requested in issue #124. Next step is to accept the values in the new app form.

This moves the configuration to its own "Configuration" tab and keeps the tasks in a tab named "Tasks". The 4 attributes common to all apps (ID, instances, CPUs, and memory) are always in the header. Everything else is now in the "Configuration" tab.

![screenshot 2014-02-05 15 28 48](https://f.cloud.github.com/assets/29612/2093707/87b2fba2-8ebd-11e3-91ba-26cb38c589c6.png)