add visual components for biquad/dynamics compressor; adjust style

	modified:   biquad-filter.html
	modified:   dynamic-compressor.html
	modified:   index.html
	new file:   static/js/analyser.js
	modified:   static/js/biquad-filter.js
	modified:   static/js/dynamic-compressor.js
	modified:   style/uitest.css