Installation status message for app doesn't close on install

[Joncy]

1. Describe your issue ( Expected and actual behaviour )

When installing an app install status box doesn't finish although app is installed.

When inspecting console I get:

undefined Setting everything up for you...

#undefined Downloading light-control dependencies... [light-control] http server started on :::62749

Exception in routes stack: Error: App already exists at _installFromDir (/Users/joncy/Code/netbeast-code/dashboard/src/models/_install.js:40:17) at /Users/joncy/Code/netbeast-code/dashboard/src/models/_install.js:73:5 at /Users/joncy/Code/netbeast-code/dashboard/node_modules/gift/lib/index.js:46:14 at ChildProcess.exithandler (child_process.js:194:7) at emitTwo (events.js:87:13) at ChildProcess.emit (events.js:172:7) at maybeClose (internal/child_process.js:817:16) at Process.ChildProcess._handle.onexit (internal/child_process.js:211:5)

2. Steps to reproduce the problem

Download fresh release of dashboard (through git clone). Download plugin (maybe not necessary). Download light-control app.

3. Please left us some versioning details like..

* Where is the dashboard running (OS): Mac OS X 
* Dashboard version: 0.5.8
* npm & node version: node v4.1.1 npm v2.14.4

Thanks, I hope we can figure it out as fast as posible :)

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