Added volume to example

Closes https://github.com/RustAudio/dsp-chain/issues/69
Merge pull request #73 from mitchmindtree/master

Added note to readme about integrating PA as a static lib, moved frames*...
Added volume to example

Closes https://github.com/RustAudio/dsp-chain/issues/69
Fixed timer in example
Merge branch 'master' of https://github.com/bvssvni/dsp-chain
Merge pull request #72 from bvssvni/master

Added volume to example
Fixed build status button
Made decrement-timer-else-break a one liner in example