iaxclient 2.1beta3 released

The iaxclient team is pleased to announce the release of iaxclient
2.1beta3.

This third beta release offers a number of incremental improvements
over the last (2.1beta2) beta release.

- Fixed portmixer to be able to use USB audio input devices.
- Fixed portmixer to better support certain [obscure] USB audio output
devices.
- Fixed configure script to better deal with --disable-video and
libvidcap.
- Fixes and cleanups to contrib/tcl.
- Updates to README.VisualStudio.
- Added novideo VS2005 configurations for building on Windows without
video support.
- Updated libvidcap.vcproj to use libvidcap-0.2.1 on Windows.
libvidcap-0.2.1 is recommended for Mac and Linux too.
- Numerous fixes to VS2005 projects.
- Add Visual Studio project and solution for iaxcomm.
- Fixes for 'make dist'.
- Fix to make the API function iaxc_version() always defined.

Thanks go out to the entire iaxclient community for their bug reports,
questions, and patches. Special thanks to stevebvt and Mats Bengtsson
for their code contributions.