Version 0.2.0

Release notes

This release mainly has various optimizations being done so far in the library

• Improved sample app to provide multiple language selection to see StringPacks in action
• Various performance improvement
• Various memory usage optimizations
• Robolectric unit tests
• Added support for apps to pull the library from maven instead of copying the entire library/ folder. You still have to copy scripts/ and pack.gradle from library/ folder as specified in README.md