Volna 0.8c bugfix

This is an early alpha release for volna so there are some rough edges.This release addresses a few bugs (probably it introduces a few new ones...) like oscillator spread not working and app closing if you press play without having recorded something previously! If you are brave enough to try this, I would appreciate your feedback here on github. So don't hesitate to open up an issue. However I cannot promise a prompt response, because this is a hobby of mine, released as open source software, and is provided as is without any warranty of any kind. So If this release does something bad to your phone or tablet don't blame me. Proceed at your own risk.