Added 'Show Inspector' menu item.
Merge pull request #370 from edgy360/master

Add 'Show Inspector' menu item
Created AppiumServerArgument class for AppiumModel and converted all arguments.
Refactored 'Platform' enum and changed to 'AppiumPlatform'.
Merge pull request #371 from edgy360/master

Refactor AppiumModel
Made the inspector close when stopping the server.
Merge pull request #372 from edgy360/master

Close the Inspector when stopping the server
Merge pull request #369 from bhpcode/master

Fix #367 (unknown selector on OSX 10.8 and less)