Previously lib-src that we controlled had their cmake files with them. This is clearer.
Also added place holders for help and locale.
Also enabled libvorbis and soundtouch and disabled portburn.
https://github.com/sakra/cotire
Currently we only use it for precompiled headers for Audacity src.
There is a 'unity' build, but it needs work by us to fix it for duplicate
definition.
These now all appear in the MSVC project.
Currently only FileDialog, Nyquist, mod-script-pipe compile and link, and Audacity compiles.
Still to set include directories and flags for most of the libs.
