cleanup code
removed unused method
Cleaned up layout code.

Now uses butterknife http://jakewharton.github.io/butterknife/
Merge pull request #1 from phiaseitz/layout-cleanup

Cleaned up layout code.
REFACTOR: using string-array resource to hold different audio files & refactored if-else chains
Merge pull request #2 from phiaseitz/Refactor

Refactored Choosing a Sound File
merged master into cv