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 #88 from telerik/vladimirov/remove-fibers-leak

Remove fibers leaks
Replace retryCount with timeout

When starting Android emulator we were using --retryCount option, which is difficult to be explained. It it replaced with --timeout option, which is the allowed time to start the emulator device(wait to boot). The default value is 120 seconds. retryCount option is removed as it is not used anymore.