Add more API methods

[Eeems]

• [x] Stop app by name
• [x] Pause app by name (Will only do anything if it's the active app
• [x] Get current app
• [x] Get list of paused apps
• [x] Get list of installed apps

[Eeems]

Also, this is currently untested, just code I wrote and made sure it would compile.

[Eeems]

Okay, tested now