Release 2.0.0

• Merge pull request #8 from kanzitelli/expo-modules (673cb07)
• new video added (e56f53e)
• Update README.md (5d8db15)
• [Android] excluding expo-file-system (ea6f42a)
• BButton integration (710b85e)
• PureFunc type (4c8b6b9)
• expo examples (cd75935)
• expo-localization integration (eb0e493)
• expo-localization added (2581890)
• services names (acb6b6b)
• stores names (ba18b1f)
• [iOS] Expo setup (d9f7800)
• [Android] Expo setup (7a921ba)
• expo installed (2402cc8)
• packages update (5771767)
• description update (d445396)