beta3.6 build 4 released

[Derek]

This build incorporates the following changes:

1. lengthened auto-start buffer to avoid clipping at start
2. fixed problem when path to volume controls containing spaces
3. fixed 24-bit view signature stopping overview display from working
4. improved detection of digital input soundcards.

Download here: http://www.wavecor.co.uk/wavebeta.html