Installer for portaudio lib for osx and linux

PortAudio uses "autoconf" tools to generate Makefiles for Linux and Mac platforms. The source for these are and If you modify either of these files then please run this command before testing and checking in your changes.

autoreconf -if

Then test a build by doing:

./configure make clean make sudo make install

then check in the related files that are modified. These might include files like:

configure config.guess depcomp