Project refactor, clean-up and export functionality

- Created a Unity Project
- Created a basic folder structure
- Added OUYA menu item to export the package (core & full)
- Deleted the package from the repository
- Deleted .DS_Store
- OuyaInput inside Plugins folder, to avoid getting build probles with InputHandlerPattern.js
- Added a .gitignore
- Disabled warnings for InputHandlerPattern.cs
- Using meta files (version control friendly)