move zap_wanpipe.c to use the read and write from sangoma_tdm_api.h.
cleanups and lots of comments added to sangoma_tdm_api.h
some fixes to sangoma_tdm_api.h to make the api more consistent between windows and nix.
git-svn-id: http://svn.openzap.org/svn/openzap/trunk@51 a93c3328-9c30-0410-af19-c9cd2b2d52af
FreeSWITCH is a Software Defined Telecom Stack enabling the digital transformation from proprietary telecom switches to a versatile software implementation that runs on any commodity hardware. From a Raspberry PI to a multi-core server, FreeSWITCH can unlock the telecommunications potential of any device.