Begun work on implementing a file browser to select audio files to import
Can recursively navigate through directories, with only wav files and other directories being displayed.
Import activity now functions with some caveats: 1) Assumes the file is a wav. 2) duration / sample rate is not detected.
Extracting sampleRate from wavFile bytes
Added a WaveFile class to supply information about a wave file.
added methods to find bits per sample and the duration of a wave file
factored in the number of channels to the duration calculation
Modified WaveFile to not read all the bytes in, just the header.
Using WaveFile for audio imports
moved contents of ImportActivity to MainActivity and adjusted accordingly.
Cleaned up and commented code a little bit.