Extend Granulemeta to support wav files

User Stories

As the product owner for granulemeta, I want to demonstrate the ability to extend granulemeta to new file types so that we can better enable community contributions and extend granulemeta to other projects

As a ADAPD project user, I want to be able to search WAV files based on the date the data was collected, the length of the recording, and the number of data points in the recording.

Definition of Done

This issue may be closed when:

• A version of granulemeta in a feature branch in this repository can read WAV files and output the above fields in the output csv file.
• A dev branch for this repository is current with the dev branch in code-int
• A test merge from the feature branch in this repository works into the copy of code-int dev branch and all tests continue to pass.