Ported all interfaces to Windows and to Linux.
Code changes to remove the discontinuitites from the derivatives of tt with respect to source position and spikes from second derivatives of tt with respect to source position. All derivatives are now smooth.
Sandia now holds the copyright to the code and it has been approved by Sandia for public release under the BSD open source license. There are now copyright notices, license agreements and disclaimers at the top of every source code file.