Remove fibers leaks

Remove the intentional leak of fibers. It was used to workaround bug in node-fibers which is already fixed, so we do not need the workaround anymore.
http://teampulse.telerik.com/view#item/277114
Merge pull request #520 from Icenium/vladimirov/remove-fibers-leak

Remove fibers leaks
Appstore commands prompt for AppleID

If you do not specify AppleID, appstore commands prompt you to provide it instead of failing with error. Add AppstoreApplicationCommandBase and change current appstore commands to extend it. Add getAppleId method in order to get the id. Change in help.txt to show that AppleID is no longer mandatory parameter.

http://teampulse.telerik.com/view#item/274748